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Unit 5　课时作业(三)
(分值:45分)
Ⅰ.单词拼写(共10题;每题1分,共10分)
1.We 　　　　 (遭遇) a number of difficulties while protecting the endangered animals,but we never gave up.
2.He tried to find the 　　 　　 (来源) of the problem in order to solve it completely.
3.He 　　　　 (盯着看) out of the window,as if thinking about something.
4.There once lived many 　　　　 (种类) of plants and wild animals in the nearby forest,but now we could find few.
5.Judging by her 　　　　 (反应),she liked the birthday present.
6.Scientists have warned that it will take a long time for the ecological systems to 　　　　 (恢复) once they are destroyed.
7.I decided to 　　　　 (专注) all my efforts on finding somewhere to live.
8.From her book,we can learn that honesty is an important 　　　　 (要素) of her success.
9.The performance by the ballet dancers was 　　　　 (令人惊叹的),showcasing their incredible talent and grace.
10.The painting created a striking 　　　　 (图像) of a serene landscape.
Ⅱ.句子语法填空(共10题;每题1.5分,共15分)
1.Please make sure to book your 　　　　 (accommodate) in advance during peak travel times.
2.The patient’s 　　　　 (recover) from the surgery was faster than expected.
3.On such 　　　　 weather,all the rivers were 　　　　 and even fresh snow 　　　　 instantly,which made it rather difficult for us to move about.(freeze)
4.He has a remarkable ability to maintain 　　　　 (concentrate) for long periods of time.
5.The store provides a wide 　　　　 (vary) of products to meet the needs of its customers.
6.The audience’s 　　　　 (react) to the performance was very enthusiastic.
7.He is passionate about 　　　　 (photograph) and often goes to the countryside to take pictures of scenery on weekends.
8.We encountered many difficulties,but we completed the task after 　　　　.
9.The 　　　　 news left everyone in the room completely 　　　　.(shock)
10.The car is moving 　　　　 a speed of 80 kilometres per hour on the highway.
Ⅲ.情境写作(共5题;每题2分,共10分)
1.He resigned for 　　　　　　　　　　　 (各种各样的) reasons,the most important of which was that he wanted to devote himself to environmental protection.
2.We should adjust our aim 　　　　　　　　　　 (不时) in order to go ahead continuously.
3.The elevator can support the weight of 　　　　　 (多达) 1,000 kilograms.
4.To reach the mountain top before dusk,the climbers decided to 　　　　　　　　　　 (不顾天气恶劣) and went ahead.
5. 　　　　　　　　　　　　　　　　　　 (正是他的勇气) kept him going in the face of adversity.
Ⅳ.阅读理解(共4题;每题2.5分,共10分)
The Amazon rainforest,is as undisturbed a place as most people can imagine,but even there,the effects of a changing climate are playing out.Now,research suggests that many of the region’s most sensitive bird species are starting to evolve in response to warming.
Birds are often considered sentinel (哨兵) species—meaning that they indicate the overall health of an ecosystem—so scientists are particularly interested in how they’re responding to climate change.In general,the news has not been good.For instance,a 2019 report by the National Audubon Society found that more than two-thirds of North America’s bird species will be in danger of extinction by 2100 if warming trends continue on their current course.
For the new study,researchers collected the biggest dataset at the time on the Amazon’s resident birds,representing dozens of non-migratory species and lasting for 40 years from 1979 to 2019.During the study period,the average temperature in the region rose,while the amount of rainfall declined,making for a hotter,dryer climate overall.According to a report,36 species have lost substantial weight,as much as 2 per cent of their body weight per decade since 1980.Meanwhile,almost all the species showed some decrease in average body mass,while a third grew longer wings.
Because of the study’s long time series and large sample sizes,the authors were able to show the morphological (形态学的) effects of climate change on resident birds.However,the researchers themselves are unsure and wonder what advantage the wing length changes give the birds,but suppose smaller birds may have an easier time keeping cool.In general,smaller animals have a larger rate of surface area to body size,so they dissipate more heat faster than a bigger animal.Less available food,such as fruit or insects,in dryer weather might lead to smaller body size.
【语篇导读】 本文是说明文。文章主要介绍了气候变化对鸟类的影响。
(　　)1.Why are scientists fond of doing research on birds
[A] Because they have small body sizes.
[B] Because they are sensitive to hot weather.
[C] Because they live in an undisturbed rainforest.
[D] Because they are ecological balance indicators.
(　　)2.What can we learn from the new study
[A] A third of species have been extinct for a decade.
[B] 36 species lost 2% of their body weight every year.
[C] Two-thirds of species showed a considerable decrease in weight.
[D] A third of species responded to climate change with longer wings.
(　　)3.What does the underlined word “dissipate” in the last paragraph mean
[A] Take on. [B] Give off.
[C] Put up. [D] Lead to.
(　　)4.What would probably the researchers further study
[A] Why it is easier for smaller animals to keep cool.
[B] What effects the wing length changes have on birds.
[C] Why the Amazonian birds have lost substantial weight.
[D] Whether bird species in North America will be extinct in 2100.Unit 5　课时作业(四)
单元知识综合练
(分值:52.5分)
Ⅰ.熟词生义(共10题;每题1分,共10分)
1.measure
A.n.措施,方法　B.v.估量,判定　C.n.量,程度　D.v.(指尺寸、长短、数量等)量度为
①It’s difficult to measure the success of the campaign at this stage.　　　
②The pond measures about 5 metres across.　　 　
③We must take preventive measures to reduce crime in the area. 　　　
④She achieved some measure of success with her first book. 　　　
【答案】 ①B　②D　③A　④C
2.写出下列句中黑体词的含义。
①I filed the letters away in a drawer. 　　　　　　　
②Athletes need to maintain the correct starting position. 　　　　　　　
③I froze with fright,too scared to move an inch. 　　　　　　　
④The police eventually recovered the stolen cultural relics. 　　　　　　　
⑤My grandmother survived her husband by many years. 　　　　　　　
⑥The stock market crashed yesterday,causing widespread panic. 　　　　　　　
【答案】 ①v.把……归档　②n.姿势　③v.突然停止,呆住　④v.找回,寻回　⑤v.比……活得长　⑥v.暴跌
Ⅱ.七选五(共5题;每题2.5分,共12.5分)
Growing plants is often seen as a very “green” thing to do,but like many products,they take a huge amount of energy to produce.1.　　　 For example,they use geothermal (地热的) energy to heat greenhouses and solar power to supply electricity and lighting.While domestic growing doesn’t involve the same carbon footprint as commercial growing,it’s important to consider what we can all do to minimise our own impact while still enjoying growing plants.
Over-consumption of plants is a big issue.It’s so easy to get overexcited when you see all these incredible plants,and you can end up carrying home huge numbers of them.2.　　　 The more plants you have,the more limited your time and resources become,and plants can suffer.This leads to another issue—many people may end up throwing away their plants which don’t look perfect or stop flowering,in a similar way to the world of fast fashion.3.　　　
If you are ready and able to increase your collection,propagate (繁殖) from your own plants rather than buying more,and share plants with others.4.　　　 Meanwhile,we can build a community of like-minded,passionate plant people.
Recycling takes a huge amount of input,which can end up more damaging to the environment,so instead of buying something of lower quality that needs replacing every year,buy fewer things of a higher quality.5.　　　 And they can be passed down through the generations.
A.But large collections call for an enormous amount of work.
B.Many commercial growers continue to market their produce.
C.This removes the need to buy plants and encourages a sharing culture.
D.These will last many years and be more cost-effective in the long term.
E.So it’s important to assess your collection and buy plants you have time to look after.
F.Throwing them away will greatly reduce your gardening footprint on the environment.
G.Many large-scale growers have used technology to minimise their impact on the environment.
【语篇导读】 本文是说明文。文章主要说明了植物过度消耗所造成的危害,以及我们应该如何预防。
1.【答案】 G
【解析】 上文提到种植植物需要大量的能量,下文举例说明种植者是如何减少种植对环境的影响的。G项符合语境,点明大规模种植者运用技术减少了对环境的影响,下文中的they正是指代G项中的Many large-scale growers。故选G。
2.【答案】 A
【解析】 上文提到将大量植物带回家,下文指出将大量植物带回家所产生的不好的结果,即为什么不要将大量植物带回家。由此可知,设空处引起下文,和上文是转折关系,也应指出为什么不要将大量植物带回家。A项符合语境。故选A。
3.【答案】 E
【解析】 上文说将大量植物带回家的结果是最终会抛弃那些看起来不完美或无法开花的植物。设空处是对本段的总结,告诉我们正确的做法是什么。E项符合语境。故选E。
4.【答案】 C
【解析】 上文提到要用自己的植物繁殖,并且与他人分享植物。设空处应承接上文,指出这么做的好处。C项符合语境,上文的share plants with others与C项中的a sharing culture相呼应。故选C。
5.【答案】 D
【解析】 上文指出与其买一些质量较差的东西,每年都需要更换,不如少量购买一些质量较高的东西。设空处承接上文,解释了这么做的原因。D项符合语境,选项中的These指代上文中的fewer things of a higher quality。故选D。
Ⅲ.完形填空(共15题;每题1分,共15分)
A lost baby elephant has been united again with its mother with the help of the Forest Department.The story happened when the baby elephant was discovered walking
　1　,anxiously looking for its mother in the huge wild areas of the Tiger Reserve at Pollachi.
An official 　2　 the situation when he was checking the monitor (监控) and it immediately made him 　3　.As a matter of fact,it was he who shared the inspiring process of the 　4　 online later,along with a moving photo showing the exciting get-together.
“The year ended with a(n) 　5　 event for us,” the official wrote on his post.“After a lost baby elephant was saved in the Tiger Reserve,our foresters united it with its mother and the herd (象群).”
After hours of searching,the baby elephant was 　6　 by a team full of love and determination and they immediately 　7　.
Using advanced technology such as drones (无人机) and the knowledge of 　8　 forest watchers,the Forest Department successfully found the herd,　9　 the safety of the baby elephant.
After 　10　 that the youngster’s family had walked 4 kilometres from the baby,the team tried various ways to 　11　 the baby to walk towards its family,including using the sound similar to that of its mother to 　12　 it.Finally,they made it—it was really a(n) 　13　.
The official took a picture of the baby nestling tightly with its mother and　14　 the excellent performance of the Forest Department staff online.And the heroes in this event are praised for their 　15　.Under the photo,a sentence “A picture is worth a thousand words.” was written.
【语篇导读】 本文是记叙文。文章主要讲述了一只小象在森林部门的帮助下与母亲及象群团聚的故事。
(　　)1.[A] confidently [B] alone
[C] fast [D] secretly
【答案】 B
【解析】 根据上文“A lost baby elephant has...the Forest Department.”可知,小象是独自(alone)行走,正在寻找它的母亲。故选B。
(　　)2.[A] considered [B] expected
[C] experienced [D] noticed
【答案】 D
【解析】 根据下文“when he was checking the monitor(监控)”可知,一位官员在看监控时注意到了(noticed)这只走丢的小象。故选D。
(　　)3.[A] angry [B] regretful
[C] concerned [D] awkward
【答案】 C
【解析】 根据上文语境可知,一只小象在巨大的荒野中焦急地寻找它的母亲,这让发现这一情况的这位官员非常担忧(concerned)。故选C。
(　　)4.[A] competition [B] research
[C] rescue [D] experiment
【答案】 C
【解析】 根据语境及下文可知,他之后在网上分享了救援(rescue)过程。故选C。
(　　)5.[A] heart-warming [B] common
[C] unlucky [D] ground-breaking
【答案】 A
【解析】 根据下文“our foresters united it with its mother and the herd (象群)”可知,这是一件暖人心扉的(heart-warming)事件。故选A。
(　　)6.[A] trapped [B] raised
[C] cured [D] discovered
【答案】 D
【解析】 根据设空处所在句“After hours of searching...full of love and determination”可知,小象被一个充满爱和决心的团队发现了(discovered)。故选D。
(　　)7.[A] gave in [B] stood out
[C] took action [D] signed up
【答案】 C
【解析】 根据语境可知,他们一发现小象就立刻采取了行动(took action)。故选C。
(　　)8.[A] shy [B] professional
[C] calm [D] brave
【答案】 B
【解析】 根据语境可知,他们利用了先进的无人机技术和专业的(professional)森林观察员的知识。故选B。
(　　)9.[A] ensuring [B] proving
[C] stressing [D] mentioning
【答案】 A
【解析】 根据上文“the Forest Department successfully found the herd”可知,森林部门找到了象群,确保了(ensuring)小象的安全。故选A。
(　　)10.[A] explaining [B] agreeing
[C] confirming [D] remembering
【答案】 C
【解析】 根据语境可知,研究人员已确认(confirming)小象与象群相距4千米。故选C。
(　　)11.[A] follow [B] guide
[C] warn [D] choose
【答案】 B
【解析】 根据语境可知,团队用了各种方法去引导(guide)小象走向家人。故选B。
(　　)12.[A] attract [B] test
[C] comfort [D] scare
【答案】 A
【解析】 根据上文“including using the sound similar to that of its mother to”可知,团队用类似于小象母亲的声音来吸引(attract)它。故选A。
(　　)13.[A] celebration [B] opportunity
[C] pity [D] relief
【答案】 D
【解析】 根据上文“Finally,they made it”可知,救援队成功让小象找到了母亲,这让他们松了一口气。relief意为“减轻,解脱”,符合题意。故选D。
(　　)14.[A] compared [B] described
[C] measured [D] questioned
【答案】 B
【解析】 根据语境可知,这位官员在网上描述了(described)工作人员的出色表现。故选B。
(　　)15.[A] friendship [B] identity
[C] introduction [D] contribution
【答案】 D
【解析】 根据语境可知,救援队帮助小象找到了母亲和象群,他们因为所做的贡献(contribution)而受到称赞。故选D。
Ⅳ.应用文写作(15分)
假设你是李华,你校将举办以“世界野生动植物日”为主题的英文征文比赛。请你写一篇短文投稿,呼吁保护野生动植物。内容包括:
1.野生动植物的重要性;
2.保护野生动植物的方法。
注意:写作词数应为80个左右。
Protect Wildlife,Protect Ourselves
It’s well-known that wildlife is important.
[写作指导]
　　One possible version:
Protect Wildlife,Protect Ourselves
It’s well-known that wildlife is important. From the mighty elephant to the small grass,each species contributes to biodiversity,which ensures the health of our environment.
To protect our animal and plant friends,we must act responsibly.First,raise people’s awareness of wildlife preservation—wildlife is the heartbeat of our planet,essential for the balance of ecosystems.Meanwhile,promote sustainable practices like banning wildlife hunting or gathering.In addition,make efforts to build natural reserves and seed banks.
Through collective efforts,we can secure a future where humans and wildlife live together harmoniously.Let’s unite to protect the irreplaceable wonders of the wild!Unit 5　课时作业(三)
(分值:45分)
Ⅰ.单词拼写(共10题;每题1分,共10分)
1.We 　　　　 (遭遇) a number of difficulties while protecting the endangered animals,but we never gave up.
2.He tried to find the 　　 　　 (来源) of the problem in order to solve it completely.
3.He 　　　　 (盯着看) out of the window,as if thinking about something.
4.There once lived many 　　　　 (种类) of plants and wild animals in the nearby forest,but now we could find few.
5.Judging by her 　　　　 (反应),she liked the birthday present.
6.Scientists have warned that it will take a long time for the ecological systems to 　　　　 (恢复) once they are destroyed.
7.I decided to 　　　　 (专注) all my efforts on finding somewhere to live.
8.From her book,we can learn that honesty is an important 　　　　 (要素) of her success.
9.The performance by the ballet dancers was 　　　　 (令人惊叹的),showcasing their incredible talent and grace.
10.The painting created a striking 　　　　 (图像) of a serene landscape.
【答案】 1.encountered　2.source　3.stared　4.varieties 5.reaction　6.recover　7.concentrate
8.element　9.breathtaking　10.image
Ⅱ.句子语法填空(共10题;每题1.5分,共15分)
1.Please make sure to book your 　　　　 (accommodate) in advance during peak travel times.
2.The patient’s 　　　　 (recover) from the surgery was faster than expected.
3.On such 　　　　 weather,all the rivers were 　　　　 and even fresh snow 　　　　 instantly,which made it rather difficult for us to move about.(freeze)
4.He has a remarkable ability to maintain 　　　　 (concentrate) for long periods of time.
5.The store provides a wide 　　　　 (vary) of products to meet the needs of its customers.
6.The audience’s 　　　　 (react) to the performance was very enthusiastic.
7.He is passionate about 　　　　 (photograph) and often goes to the countryside to take pictures of scenery on weekends.
8.We encountered many difficulties,but we completed the task after 　　　　.
9.The 　　　　 news left everyone in the room completely 　　　　.(shock)
10.The car is moving 　　　　 a speed of 80 kilometres per hour on the highway.
【答案】 1.accommodation　2.recovery　3.freezing;frozen;froze　4.concentration　5.variety　6.reaction　7.photography　8.all 9.shocking;shocked　10.at
Ⅲ.情境写作(共5题;每题2分,共10分)
1.He resigned for 　　　　　　　　　　　 (各种各样的) reasons,the most important of which was that he wanted to devote himself to environmental protection.
2.We should adjust our aim 　　　　　　　　　　 (不时) in order to go ahead continuously.
3.The elevator can support the weight of 　　　　　 (多达) 1,000 kilograms.
4.To reach the mountain top before dusk,the climbers decided to 　　　　　　　　　　 (不顾天气恶劣) and went ahead.
5. 　　　　　　　　　　　　　　　　　　 (正是他的勇气) kept him going in the face of adversity.
【答案】 1.a variety of/varieties of/various　2.from time to time　3.up to　4.brave the elements
5.It was his courage that
Ⅳ.阅读理解(共4题;每题2.5分,共10分)
The Amazon rainforest,is as undisturbed a place as most people can imagine,but even there,the effects of a changing climate are playing out.Now,research suggests that many of the region’s most sensitive bird species are starting to evolve in response to warming.
Birds are often considered sentinel (哨兵) species—meaning that they indicate the overall health of an ecosystem—so scientists are particularly interested in how they’re responding to climate change.In general,the news has not been good.For instance,a 2019 report by the National Audubon Society found that more than two-thirds of North America’s bird species will be in danger of extinction by 2100 if warming trends continue on their current course.
For the new study,researchers collected the biggest dataset at the time on the Amazon’s resident birds,representing dozens of non-migratory species and lasting for 40 years from 1979 to 2019.During the study period,the average temperature in the region rose,while the amount of rainfall declined,making for a hotter,dryer climate overall.According to a report,36 species have lost substantial weight,as much as 2 per cent of their body weight per decade since 1980.Meanwhile,almost all the species showed some decrease in average body mass,while a third grew longer wings.
Because of the study’s long time series and large sample sizes,the authors were able to show the morphological (形态学的) effects of climate change on resident birds.However,the researchers themselves are unsure and wonder what advantage the wing length changes give the birds,but suppose smaller birds may have an easier time keeping cool.In general,smaller animals have a larger rate of surface area to body size,so they dissipate more heat faster than a bigger animal.Less available food,such as fruit or insects,in dryer weather might lead to smaller body size.
【语篇导读】 本文是说明文。文章主要介绍了气候变化对鸟类的影响。
(　　)1.Why are scientists fond of doing research on birds
[A] Because they have small body sizes.
[B] Because they are sensitive to hot weather.
[C] Because they live in an undisturbed rainforest.
[D] Because they are ecological balance indicators.
【答案】 D
【解析】 细节理解题。根据第二段第一句可知,科学家们喜欢研究鸟类是因为鸟是生态平衡的指示标志。故选D。
(　　)2.What can we learn from the new study
[A] A third of species have been extinct for a decade.
[B] 36 species lost 2% of their body weight every year.
[C] Two-thirds of species showed a considerable decrease in weight.
[D] A third of species responded to climate change with longer wings.
【答案】 D
【解析】 细节理解题。根据第三段内容可知,三分之一的物种长着较长的翅膀以应对气候变化。故选D。
(　　)3.What does the underlined word “dissipate” in the last paragraph mean
[A] Take on. [B] Give off.
[C] Put up. [D] Lead to.
【答案】 B
【解析】 猜测词义题。根据最后一段第二句以及画线词所在句可知,较小动物的表面积与身体大小的比率较大,因此散发热量更快,所以画线词意为“散发”。故选B。
(　　)4.What would probably the researchers further study
[A] Why it is easier for smaller animals to keep cool.
[B] What effects the wing length changes have on birds.
[C] Why the Amazonian birds have lost substantial weight.
[D] Whether bird species in North America will be extinct in 2100.
【答案】 B
【解析】 推理判断题。根据最后一段第二句可推知,研究人员将进一步研究鸟的翅膀长度的变化对鸟类有什么影响。故选B。Unit 5　课时作业(一)
(分值:45分)
Ⅰ.单词拼写(共10题;每题1分,共10分)
1.Some animals succeeded in 　　　　 (幸存) such a long time because they adapted themselves so well to the environment.
2.To raise people’s awareness of wildlife protection,an 　　　　 (一年一度的) campaign will be held in my hometown next month.
3.The local villagers 　　 　　 (寻求) help from scientists to clean up the river,which had been polluted for years.
4.Many wild animals are in danger of dying out,because their habitats have been partly 　　　　 (破坏) by natural disasters.
5.Share prices 　　　　 (暴跌) to an all-time low yesterday.
6.Testing needs to be done to 　　　　 (确定) the long-term effect of the medicine on humans.
7.She dedicated her life to working for the 　　　　 (慈善机构),helping those less fortunate than herself.
8.The 　　　　 (大西洋的) Ocean is one of the world’s four major oceans,separating North and South America from Europe and Africa.
9.The 　　　　 (迁徙) of the birds from the northern parts to the southern parts during winter is a fascinating natural phenomenon.
10.The museum’s collection of ancient artifacts occupies a central 　　　　 (位置) in the heart of the city,attracting visitors from all over the world.
【答案】 1.surviving　2.annual　3.sought 4.destroyed　5.crashed　6.determine
7.charity　8.Atlantic　9.migration 10.position
Ⅱ.句子语法填空(共10题;每题1.5分,共15分)
1.It was 　　　　 (amaze) that Jack should have finished the task so early.
2.The historic building 　　　　 (destroy) by fire in the past two years.
3.He held a strong belief that he would 　　　　 (eventual) realise his dream by working hard.
4.Her firm 　　　　 (determine) infected the people around her,and they all began to actively participate in environmental protection activities.
5.With the help of our English teacher,we had a discussion and finally came up with a proper 　　　　 (solve).
6.It’s incredible that the boy can swim across the river 　　　　 (measure) 100 metres wide.
7.We must find a way to ensure the 　　　　 (survive) of this species.
8.Some plants produce some smelly 　　　　 (chemistry) to keep insects away.
9.It is high time that we 　　　　 (seek) help from the media.
10.His teaching method is very 　　　　 (effect),and the students have made significant progress.
【答案】 1.amazing　2.has been destroyed 3.eventually　4.determination　5.solution
6.measuring　7.survival　8.chemicals 9.sought/should seek　10.effective
Ⅲ.情境写作(共5题;每题2分,共10分)
1.The writer travelled around the country 　　　　　　　　　　 (为了寻找) new ideas for his novel.
2.The ever-increasing human population has 　　　　　　　　 (导致) the gradual loss of wildlife habitats.
3.As we all know,bats fly at night and 　　　　　　　　　 (以……为食) insects or fruits.
4.We must 　　　　　　　　 (砍倒) these dead trees to prevent them from falling and injuring people.
5.The harder the problem is,　　　　　　　　　　　　　　　　　　　　　　　　　　 (我越有兴趣去解决它).
【答案】 1.in search of　2.led to　3.feed on
4.cut down　5.the more interested I am in solving it
Ⅳ.阅读理解(共4题;每题2.5分,共10分)
Bigger bumblebees (大黄蜂) spend time learning the locations of the most nectar-rich (花蜜多的) flowers,so they can easily find them again,new research finds.Smaller bees,on the other hand,aren’t quite as choosy in their flower selection.
After drinking from a flower,bumblebees decide if it’s worth visiting again.If the flower is rich in nectar,bumblebees will perform what are known as learning flights to study the location around the flowers.They will slowly fly around the flower,and then fly away from it,looking back at its location.They will remember the flower and the views all around it.On their next trip,the bees match what they see with the views they have already memorised.This takes them back to the flower’s location.
For the study,researchers set up an experiment in a greenhouse where they could watch bees visit artificial flowers containing varying concentrations (不同浓度) of sugar solutions.The flowers had sugar solutions ranging from 10 per cent to 50 per cent sugar.When the concentration was greater,the larger bees spent more time circling the flowers and making learning flights.When the concentration was smaller,the length of time the bees spent looking at the flower and flying around it dropped.
Smaller bees spent the same amount of effort learning where the flowers were,no matter whether the concentration of sugar was low or high.
The difference likely shows the different roles of the bees in their colonies (群体),the researchers said.
“Bigger bumblebees are able to carry larger loads (负载) and explore further from the nest than smaller ones.Smaller ones with a smaller flight range and carrying capacity cannot afford to be as picky and so accept a wider range of flowers,” the researchers said in the study.“Smaller bees often take on more tasks inside the nest,only going out to search for food when food supplies are running low.”
【语篇导读】 本文是说明文。研究发现,大黄蜂会花时间记忆最有采蜜价值的花朵位置,而小蜜蜂则不会,这种不同可能显示了蜜蜂在群体中的不同分工。
(　　)1.What is Paragraph 2 mainly about
[A] How bumblebees tell one flower from another.
[B] How bumblebees make flights among flowers.
[C] How bumblebees remember the locations of flowers.
[D] How bumblebees tell others where sweet flowers are.
【答案】 C
【解析】 段落大意题。根据第二段内容可知,本段主要讲述了大黄蜂记住一朵花的位置的方式。故选C。
(　　)2.What did researchers find out in their experiment
[A] Bees dislike the flowers in the greenhouse.
[B] The bigger flowers are,the more bees there are.
[C] Smaller bees are more likely to forget a flower’s location.
[D] The sweeter a flower is,the longer time bigger bees spend around it.
【答案】 D
【解析】 细节理解题。根据第三段中的“When the concentration...and making learning flights.”可知,花朵越甜,大体型的蜜蜂在花朵周围花费的时间就越长。故选D。
(　　)3.What can be inferred from the last paragraph
[A] Smaller bees are better at building nests.
[B] Bees’ duties might depend on their sizes.
[C] Bees of different sizes have different tastes.
[D] There’re more large bees than small ones in a nest.
【答案】 B
【解析】 推理判断题。最后一段叙述了体型大的大黄蜂能够携带更多的花蜜,而且能够探索更远的地方,而体型小的蜜蜂则不具备这种优势,它们主要在蜂巢内工作。由此可推测出,不同体型的蜜蜂有不同的职责。故选B。
(　　)4.In which part of a newspaper may this text appear
[A] Nature. [B] Technology.
[C] Style. [D] Opinion.
【答案】 A
【解析】 推理判断题。通读全文可知,本文主要围绕大黄蜂和小蜜蜂的习性展开,讲述了大黄蜂会花时间记忆值得采的花朵的位置,而小蜜蜂则不会,这主要是与其分工不同有关。由此可推知,本文的内容与自然科学有关,最有可能出自报纸中的“自然”栏目。故选A。Unit 5　课时作业(一)
(分值:45分)
Ⅰ.单词拼写(共10题;每题1分,共10分)
1.Some animals succeeded in 　　　　 (幸存) such a long time because they adapted themselves so well to the environment.
2.To raise people’s awareness of wildlife protection,an 　　　　 (一年一度的) campaign will be held in my hometown next month.
3.The local villagers 　　 　　 (寻求) help from scientists to clean up the river,which had been polluted for years.
4.Many wild animals are in danger of dying out,because their habitats have been partly 　　　　 (破坏) by natural disasters.
5.Share prices 　　　　 (暴跌) to an all-time low yesterday.
6.Testing needs to be done to 　　　　 (确定) the long-term effect of the medicine on humans.
7.She dedicated her life to working for the 　　　　 (慈善机构),helping those less fortunate than herself.
8.The 　　　　 (大西洋的) Ocean is one of the world’s four major oceans,separating North and South America from Europe and Africa.
9.The 　　　　 (迁徙) of the birds from the northern parts to the southern parts during winter is a fascinating natural phenomenon.
10.The museum’s collection of ancient artifacts occupies a central 　　　　 (位置) in the heart of the city,attracting visitors from all over the world.
Ⅱ.句子语法填空(共10题;每题1.5分,共15分)
1.It was 　　　　 (amaze) that Jack should have finished the task so early.
2.The historic building 　　　　 (destroy) by fire in the past two years.
3.He held a strong belief that he would 　　　　 (eventual) realise his dream by working hard.
4.Her firm 　　　　 (determine) infected the people around her,and they all began to actively participate in environmental protection activities.
5.With the help of our English teacher,we had a discussion and finally came up with a proper 　　　　 (solve).
6.It’s incredible that the boy can swim across the river 　　　　 (measure) 100 metres wide.
7.We must find a way to ensure the 　　　　 (survive) of this species.
8.Some plants produce some smelly 　　　　 (chemistry) to keep insects away.
9.It is high time that we 　　　　 (seek) help from the media.
10.His teaching method is very 　　　　 (effect),and the students have made significant progress.
Ⅲ.情境写作(共5题;每题2分,共10分)
1.The writer travelled around the country 　　　　　　　　　　 (为了寻找) new ideas for his novel.
2.The ever-increasing human population has 　　　　　　　　 (导致) the gradual loss of wildlife habitats.
3.As we all know,bats fly at night and 　　　　　　　　　 (以……为食) insects or fruits.
4.We must 　　　　　　　　 (砍倒) these dead trees to prevent them from falling and injuring people.
5.The harder the problem is,　　　　　　　　　　　　　　　　　　　　　　　　　　 (我越有兴趣去解决它).
Ⅳ.阅读理解(共4题;每题2.5分,共10分)
Bigger bumblebees (大黄蜂) spend time learning the locations of the most nectar-rich (花蜜多的) flowers,so they can easily find them again,new research finds.Smaller bees,on the other hand,aren’t quite as choosy in their flower selection.
After drinking from a flower,bumblebees decide if it’s worth visiting again.If the flower is rich in nectar,bumblebees will perform what are known as learning flights to study the location around the flowers.They will slowly fly around the flower,and then fly away from it,looking back at its location.They will remember the flower and the views all around it.On their next trip,the bees match what they see with the views they have already memorised.This takes them back to the flower’s location.
For the study,researchers set up an experiment in a greenhouse where they could watch bees visit artificial flowers containing varying concentrations (不同浓度) of sugar solutions.The flowers had sugar solutions ranging from 10 per cent to 50 per cent sugar.When the concentration was greater,the larger bees spent more time circling the flowers and making learning flights.When the concentration was smaller,the length of time the bees spent looking at the flower and flying around it dropped.
Smaller bees spent the same amount of effort learning where the flowers were,no matter whether the concentration of sugar was low or high.
The difference likely shows the different roles of the bees in their colonies (群体),the researchers said.
“Bigger bumblebees are able to carry larger loads (负载) and explore further from the nest than smaller ones.Smaller ones with a smaller flight range and carrying capacity cannot afford to be as picky and so accept a wider range of flowers,” the researchers said in the study.“Smaller bees often take on more tasks inside the nest,only going out to search for food when food supplies are running low.”
【语篇导读】 本文是说明文。研究发现,大黄蜂会花时间记忆最有采蜜价值的花朵位置,而小蜜蜂则不会,这种不同可能显示了蜜蜂在群体中的不同分工。
(　　)1.What is Paragraph 2 mainly about
[A] How bumblebees tell one flower from another.
[B] How bumblebees make flights among flowers.
[C] How bumblebees remember the locations of flowers.
[D] How bumblebees tell others where sweet flowers are.
(　　)2.What did researchers find out in their experiment
[A] Bees dislike the flowers in the greenhouse.
[B] The bigger flowers are,the more bees there are.
[C] Smaller bees are more likely to forget a flower’s location.
[D] The sweeter a flower is,the longer time bigger bees spend around it.
(　　)3.What can be inferred from the last paragraph
[A] Smaller bees are better at building nests.
[B] Bees’ duties might depend on their sizes.
[C] Bees of different sizes have different tastes.
[D] There’re more large bees than small ones in a nest.
(　　)4.In which part of a newspaper may this text appear
[A] Nature. [B] Technology.
[C] Style. [D] Opinion.Unit 5　课时作业(二)
(分值:50分)
Ⅰ.句子语法填空(共10题;每题1.5分,共15分)
1.We are living in an age 　　　　 online payments are becoming more and more popular in our daily lives.
2.They will run an after-class club 　　　　 kids can have fun and learn how to protect themselves.
3.I have reached a stage in my life 　　　　 I am supposed to make decisions on my own.
4.Is this the museum 　　　　 they paid a visit last month
5.It was 10 o’clock 　　　　 they went out of the cinema.
6.He still lives in the room 　　　　 there is a beautiful table.
7.The flight attendant explained the reason 　　　　 the plane was delayed to the passengers.
8.Teachers should create an environment 　　　　 children are taught how to solve problems of learning by themselves.
9.I will never forget the days 　　　　 we shared joys and sorrows.
10.I can think of many cases 　　　　 students obviously knew a lot of English words and expressions but couldn’t write a good sentence.
【答案】 1.when　2.where　3.where　4.where 5.when　6.where　7.why　8.where
9.when　10.where
Ⅱ.情境写作(共5题;每题2分,共10分)
1.There was a time 　　　　　　　　　　　　　　　　　　　　　　　　　　　　 (我在生活上有些困难).
2.It’s one of the few countries 　　　　　　　　　　　　　　　　 (人们靠左开车).
3.He got into a situation 　　　　　　　　　　　　　　　　　　 (难以辨别是非).
4.There are many reasons 　　　　　　　　　　　　　　　　 (人们喜欢旅游).
5.I don’t remember what happened on the day 　　　　　　　　　　 (他谈论的).
【答案】 1.when I had some difficulties in my life　
2.where people drive on the left　3.where it is hard to tell right from wrong　4.why people love travelling　5.that/which he talked about
Ⅲ.阅读理解(共4题;每题2.5分,共10分)
The flower doesn’t use verbs or adjectives to tell a pollinator (传粉昆虫) that it looks pretty when the pollinator flies by,at least not as far as we know.But plants do respond to the sound of bees buzzing through the air,greeting them with more sweet nectar in the hope of attracting them to land.It is a poetic and practical language that increases everyone’s chances of survival.Scientists increasingly believe that animals and plants communicate with each other.Thanks to a new study on “natural language”,now there’s additional evidence that measures how evening primroses (月见草) respond to sound.
The research team played sounds like that of bees’ wings beating evening primroses.The flowers vibrated (振动) when they heard the sounds.It’s as if they were listening.Other sounds,played at different frequencies,didn’t lead to the same result.The flowers vibrated,but didn’t increase the sweetness of their nectar production.The average sugar concentration was 20 per cent higher in flowers exposed to pollinator-like frequencies,but remained stable at the sound of higher frequency recordings and silence.
These findings led the researchers to argue that flowers function as a plant’s ears,informing the plant as a whole of what’s going on nearby and when it’s time to attract a pollinator.Plants have to be sensitive to the sound of pollinators because they have an interdependent relationship with one another.The plants rely on the pollinators for reproduction,so they produce a sweeter nectar as a kind of seduction. And the bees eat the nectar,which means they’ll be adjusted to what the flowers are doing and drawn to the sweeter food.It pays for flowers to be able to distinguish between the sound of bats and the sound of bees,for example,and for the pollinators,it’s worthwhile to find the best food in the least amount of time.
While this study is just a first step in understanding how plants respond to sound,studies on other species must be done next to better understand how flowers listen.
【语篇导读】 本文是说明文。文章介绍了研究人员通过模仿昆虫的声音来做实验,研究植物是如何回应声音的。
(　　)1.How did the researchers do the experiment
[A] By vibrating the flowers.
[B] By exposing plants to pollinators.
[C] By imitating the sound of insects.
[D] By increasing the sweetness of nectar.
【答案】 C
【解析】 细节理解题。根据第二段第一句可知,研究小组播放了类似蜜蜂翅膀拍打月见草的声音。由此可知,研究人员是通过模仿昆虫的声音来做实验的。故选C。
(　　)2.What does the underlined word “seduction”probably mean in Paragraph 3
[A] Production. [B] Attraction.
[C] Value. [D] Adjustment.
【答案】 B
【解析】 猜测词义题。根据第三段第三句中的“The plants rely on ...a sweeter nectar...”和画线词后的 “And the bees eat the nectar” 可知,植物依靠传粉昆虫来繁殖,而传粉昆虫以花蜜为食,所以它们产生更甜的花蜜是为了吸引传粉昆虫。故seduction 意为“吸引”,与B项意思相近。故选B。
(　　)3.In which aspect do plants benefit from listening
[A] Saving resources.
[B] Providing more food.
[C] Knowing different species.
[D] Promoting the reproduction.
【答案】 D
【解析】 细节理解题。根据第三段的第二、第三句可知,植物从听声音中获得的好处是促进繁殖。故选D。
(　　)4.What does the study mainly focus on
[A] How certain plants react to sound.
[B] How to interact with plants.
[C] The languages used in nature.
[D] The plants’ methods of survival.
【答案】 A
【解析】 细节理解题。根据第一段最后一句及最后一段内容可知,这项研究主要关注某些特定植物是如何回应声音的。故选A。
Ⅳ.语法填空(共10题;每题1.5分,共15分)
Sea turtles live in coastal areas and open waters all over the world.However,many species of them are endangered or critically endangered.What is the 1.　　 　　 (great) threat to them There is no doubt that the most dangerous one is industrial-scale fisheries.Sea turtles get caught in nets 2.　　　　 (intend) to catch other animals.Abandoned fishing gear (渔具) also caused danger to them.Besides,climate change is causing more storms and 3.　　 　　 rise in sea levels,which have destroyed nesting places.
Coastal development 4.　　　　 (affect) sea turtles in the past years.Pollution harms the animals and vehicles pack down beach sand,5.　　　　 makes it hard for female sea turtles to dig nests.And lights from buildings and roads confuse the baby turtles and lead them away 6.　　　　 the ocean.Very few of them will make it to adulthood,so each adult turtle is 7.　　　　 (extreme) special.
Many people and 8.　　　　 (organisation) are working to change the situation.The World Wild Fund For Nature (WWF) is working with fisheries 9.　　　　 (help) them switch to more friendly fishing hooks and nets.Installing LED lights inside of nets can also help catch sea turtles’ attention to their 10.　　　　 (exist),so the animals can swim around them.Through these efforts,people hope they can really save these sea turtles.
【语篇导读】 本文是说明文。文章主要介绍了海龟的生存危机及保护措施。
1.【答案】 greatest
【解析】 考查形容词最高级。根据空前的the可知,设空处应用形容词最高级,表示“最大的”。故填greatest。
2.【答案】 intended
【解析】 考查非谓语动词。句中已有谓语动词,设空处应用非谓语动词作后置定语。be intended to do sth意为“打算做某事”,此处应去掉be动词,用过去分词作定语。故填intended。
3.【答案】 a
【解析】 考查冠词。a rise in sea levels意为“海平面上升”,应用不定冠词限定。故填a。
4.【答案】 has affected
【解析】 考查动词的时态和主谓一致。设空处为句子的谓语动词,根据时间状语in the past years可知,应用现在完成时;主语为Coastal development,助动词应用has。故填has affected。
5.【答案】 which
【解析】 考查定语从句。设空处引导非限制性定语从句,在从句中作主语,且指代前面整个句子,应用关系代词which引导该从句。故填which。
6.【答案】 from
【解析】 考查介词。lead sb/sth away from意为“引导某人/某物远离……”。故填from。
7.【答案】 extremely
【解析】 考查副词。设空处应用副词修饰后面的形容词special。故填extremely。
8.【答案】 organisations
【解析】 考查名词复数。organisation为可数名词,意为“组织”,根据空前的Many可知,应用复数形式。故填organisations。
9.【答案】 to help
【解析】 考查动词不定式。设空处应用动词不定式作目的状语。故填to help。
10.【答案】 existence
【解析】 考查名词。根据空前的their可知,设空处应用名词作介词to的宾语。故填existence。Unit 5　课时作业(四)
单元知识综合练
(分值:52.5分)
Ⅰ.熟词生义(共10题;每题1分,共10分)
1.measure
A.n.措施,方法　B.v.估量,判定　C.n.量,程度　D.v.(指尺寸、长短、数量等)量度为
①It’s difficult to measure the success of the campaign at this stage.　　　
②The pond measures about 5 metres across.　　 　
③We must take preventive measures to reduce crime in the area. 　　　
④She achieved some measure of success with her first book. 　　　
2.写出下列句中黑体词的含义。
①I filed the letters away in a drawer. 　　　　　　　
②Athletes need to maintain the correct starting position. 　　　　　　　
③I froze with fright,too scared to move an inch. 　　　　　　　
④The police eventually recovered the stolen cultural relics. 　　　　　　　
⑤My grandmother survived her husband by many years. 　　　　　　　
⑥The stock market crashed yesterday,causing widespread panic. 　　　　　　　
Ⅱ.七选五(共5题;每题2.5分,共12.5分)
Growing plants is often seen as a very “green” thing to do,but like many products,they take a huge amount of energy to produce.1.　　　 For example,they use geothermal (地热的) energy to heat greenhouses and solar power to supply electricity and lighting.While domestic growing doesn’t involve the same carbon footprint as commercial growing,it’s important to consider what we can all do to minimise our own impact while still enjoying growing plants.
Over-consumption of plants is a big issue.It’s so easy to get overexcited when you see all these incredible plants,and you can end up carrying home huge numbers of them.2.　　　 The more plants you have,the more limited your time and resources become,and plants can suffer.This leads to another issue—many people may end up throwing away their plants which don’t look perfect or stop flowering,in a similar way to the world of fast fashion.3.　　　
If you are ready and able to increase your collection,propagate (繁殖) from your own plants rather than buying more,and share plants with others.4.　　　 Meanwhile,we can build a community of like-minded,passionate plant people.
Recycling takes a huge amount of input,which can end up more damaging to the environment,so instead of buying something of lower quality that needs replacing every year,buy fewer things of a higher quality.5.　　　 And they can be passed down through the generations.
A.But large collections call for an enormous amount of work.
B.Many commercial growers continue to market their produce.
C.This removes the need to buy plants and encourages a sharing culture.
D.These will last many years and be more cost-effective in the long term.
E.So it’s important to assess your collection and buy plants you have time to look after.
F.Throwing them away will greatly reduce your gardening footprint on the environment.
G.Many large-scale growers have used technology to minimise their impact on the environment.
Ⅲ.完形填空(共15题;每题1分,共15分)
A lost baby elephant has been united again with its mother with the help of the Forest Department.The story happened when the baby elephant was discovered walking
　1　,anxiously looking for its mother in the huge wild areas of the Tiger Reserve at Pollachi.
An official 　2　 the situation when he was checking the monitor (监控) and it immediately made him 　3　.As a matter of fact,it was he who shared the inspiring process of the 　4　 online later,along with a moving photo showing the exciting get-together.
“The year ended with a(n) 　5　 event for us,” the official wrote on his post.“After a lost baby elephant was saved in the Tiger Reserve,our foresters united it with its mother and the herd (象群).”
After hours of searching,the baby elephant was 　6　 by a team full of love and determination and they immediately 　7　.
Using advanced technology such as drones (无人机) and the knowledge of 　8　 forest watchers,the Forest Department successfully found the herd,　9　 the safety of the baby elephant.
After 　10　 that the youngster’s family had walked 4 kilometres from the baby,the team tried various ways to 　11　 the baby to walk towards its family,including using the sound similar to that of its mother to 　12　 it.Finally,they made it—it was really a(n) 　13　.
The official took a picture of the baby nestling tightly with its mother and　14　 the excellent performance of the Forest Department staff online.And the heroes in this event are praised for their 　15　.Under the photo,a sentence “A picture is worth a thousand words.” was written.
【语篇导读】 本文是记叙文。文章主要讲述了一只小象在森林部门的帮助下与母亲及象群团聚的故事。
(　　)1.[A] confidently [B] alone
[C] fast [D] secretly
(　　)2.[A] considered [B] expected
[C] experienced [D] noticed
(　　)3.[A] angry [B] regretful
[C] concerned [D] awkward
(　　)4.[A] competition [B] research
[C] rescue [D] experiment
(　　)5.[A] heart-warming [B] common
[C] unlucky [D] ground-breaking
(　　)6.[A] trapped [B] raised
[C] cured [D] discovered
(　　)7.[A] gave in [B] stood out
[C] took action [D] signed up
(　　)8.[A] shy [B] professional
[C] calm [D] brave
(　　)9.[A] ensuring [B] proving
[C] stressing [D] mentioning
(　　)10.[A] explaining [B] agreeing
[C] confirming [D] remembering
(　　)11.[A] follow [B] guide
[C] warn [D] choose
(　　)12.[A] attract [B] test
[C] comfort [D] scare
(　　)13.[A] celebration [B] opportunity
[C] pity [D] relief
(　　)14.[A] compared [B] described
[C] measured [D] questioned
(　　)15.[A] friendship [B] identity
[C] introduction [D] contribution
Ⅳ.应用文写作(15分)
假设你是李华,你校将举办以“世界野生动植物日”为主题的英文征文比赛。请你写一篇短文投稿,呼吁保护野生动植物。内容包括:
1.野生动植物的重要性;
2.保护野生动植物的方法。
注意:写作词数应为80个左右。
Protect Wildlife,Protect Ourselves
It’s well-known that wildlife is important.Unit 5　课时作业(二)
(分值:50分)
Ⅰ.句子语法填空(共10题;每题1.5分,共15分)
1.We are living in an age 　　　　 online payments are becoming more and more popular in our daily lives.
2.They will run an after-class club 　　　　 kids can have fun and learn how to protect themselves.
3.I have reached a stage in my life 　　　　 I am supposed to make decisions on my own.
4.Is this the museum 　　　　 they paid a visit last month
5.It was 10 o’clock 　　　　 they went out of the cinema.
6.He still lives in the room 　　　　 there is a beautiful table.
7.The flight attendant explained the reason 　　　　 the plane was delayed to the passengers.
8.Teachers should create an environment 　　　　 children are taught how to solve problems of learning by themselves.
9.I will never forget the days 　　　　 we shared joys and sorrows.
10.I can think of many cases 　　　　 students obviously knew a lot of English words and expressions but couldn’t write a good sentence.
Ⅱ.情境写作(共5题;每题2分,共10分)
1.There was a time 　　　　　　　　　　　　　　　　　　　　　　　　　　　　 (我在生活上有些困难).
2.It’s one of the few countries 　　　　　　　　　　　　　　　　 (人们靠左开车).
3.He got into a situation 　　　　　　　　　　　　　　　　　　 (难以辨别是非).
4.There are many reasons 　　　　　　　　　　　　　　　　 (人们喜欢旅游).
5.I don’t remember what happened on the day 　　　　　　　　　　 (他谈论的).
Ⅲ.阅读理解(共4题;每题2.5分,共10分)
The flower doesn’t use verbs or adjectives to tell a pollinator (传粉昆虫) that it looks pretty when the pollinator flies by,at least not as far as we know.But plants do respond to the sound of bees buzzing through the air,greeting them with more sweet nectar in the hope of attracting them to land.It is a poetic and practical language that increases everyone’s chances of survival.Scientists increasingly believe that animals and plants communicate with each other.Thanks to a new study on “natural language”,now there’s additional evidence that measures how evening primroses (月见草) respond to sound.
The research team played sounds like that of bees’ wings beating evening primroses.The flowers vibrated (振动) when they heard the sounds.It’s as if they were listening.Other sounds,played at different frequencies,didn’t lead to the same result.The flowers vibrated,but didn’t increase the sweetness of their nectar production.The average sugar concentration was 20 per cent higher in flowers exposed to pollinator-like frequencies,but remained stable at the sound of higher frequency recordings and silence.
These findings led the researchers to argue that flowers function as a plant’s ears,informing the plant as a whole of what’s going on nearby and when it’s time to attract a pollinator.Plants have to be sensitive to the sound of pollinators because they have an interdependent relationship with one another.The plants rely on the pollinators for reproduction,so they produce a sweeter nectar as a kind of seduction. And the bees eat the nectar,which means they’ll be adjusted to what the flowers are doing and drawn to the sweeter food.It pays for flowers to be able to distinguish between the sound of bats and the sound of bees,for example,and for the pollinators,it’s worthwhile to find the best food in the least amount of time.
While this study is just a first step in understanding how plants respond to sound,studies on other species must be done next to better understand how flowers listen.
【语篇导读】 本文是说明文。文章介绍了研究人员通过模仿昆虫的声音来做实验,研究植物是如何回应声音的。
(　　)1.How did the researchers do the experiment
[A] By vibrating the flowers.
[B] By exposing plants to pollinators.
[C] By imitating the sound of insects.
[D] By increasing the sweetness of nectar.
(　　)2.What does the underlined word “seduction”probably mean in Paragraph 3
[A] Production. [B] Attraction.
[C] Value. [D] Adjustment.
(　　)3.In which aspect do plants benefit from listening
[A] Saving resources.
[B] Providing more food.
[C] Knowing different species.
[D] Promoting the reproduction.
(　　)4.What does the study mainly focus on
[A] How certain plants react to sound.
[B] How to interact with plants.
[C] The languages used in nature.
[D] The plants’ methods of survival.
Ⅳ.语法填空(共10题;每题1.5分,共15分)
Sea turtles live in coastal areas and open waters all over the world.However,many species of them are endangered or critically endangered.What is the 1.　　 　　 (great) threat to them There is no doubt that the most dangerous one is industrial-scale fisheries.Sea turtles get caught in nets 2.　　　　 (intend) to catch other animals.Abandoned fishing gear (渔具) also caused danger to them.Besides,climate change is causing more storms and 3.　　 　　 rise in sea levels,which have destroyed nesting places.
Coastal development 4.　　　　 (affect) sea turtles in the past years.Pollution harms the animals and vehicles pack down beach sand,5.　　　　 makes it hard for female sea turtles to dig nests.And lights from buildings and roads confuse the baby turtles and lead them away 6.　　　　 the ocean.Very few of them will make it to adulthood,so each adult turtle is 7.　　　　 (extreme) special.
Many people and 8.　　　　 (organisation) are working to change the situation.The World Wild Fund For Nature (WWF) is working with fisheries 9.　　　　 (help) them switch to more friendly fishing hooks and nets.Installing LED lights inside of nets can also help catch sea turtles’ attention to their 10.　　　　 (exist),so the animals can swim around them.Through these efforts,people hope they can really save these sea turtles.

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