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八年级（上册）同步练习 Unit1
Part 1 Listening (第一部分 听力)(25分)
I.Listening comprehension.(听力理解。)(本大题共15题，共25分)
A.Listen and choose the right pictures.(根据你所听到的内容，选出相应的图片，每句放两遍。)(共5分)
( )1.A.
( )2.A.
( )3.A.
( )4.A.
( )5.A.
B. B.-
B.
B.
C.
C.
C.
C.
B.Listen to the passage and choose the best answer to the question you hear.(根据你听到的短文，选出最恰当的答案，短文播放两遍。)(共10分)
( )6.Why did the author's family have no water
A.Because they forgot to pay the water bill
B.Because a pipe burst in their neighborhood.
C.Because there was a long drought.
( )7.How was the author at the beginning of the water shortage
A.Worried and scared.
B.Not very serious about it.
C.Angry and frustrated.
( )8.What problem did the author's little brother face
A.He couldn't wash his hands.
B.He couldn't take a bath.
C.He couldn't drink water.
( )9.What lesson did the author learn from this experience
A.Water is expensive and should be bought in advance.
B.Water is life and should never be wasted.
C.Water shortages only happen in summer.
( )10.What did the author start doing after the water came back
A.Taking shorter showers and reusing water.
B.Buying bottled water every day.
C.Complaining to the water company.
C.Listen to the passage and complete the following sentences.(听短文，完成下列句子，每空 格不超过三词，短文播放两遍。)(共10分)
11.Recycling is an essential practice that helps .
12.When waste is ,it releases harmful chemicals.
13.Making new products from recycled materials uses than producing them from raw materials.
14.Trees,oil,and minerals are .
15.Everyone should sort and support recycling programs to create a greener future.
Part 2 Vocabulary and Grammar
(第二部分 词汇和语法)(20分)
Ⅱ.Complete the following sentences as required.(根据所给要求完成句子。)(本大题共3题，每题2分，共6分)
She has to make full use of the water. (改为一般疑问句)
Water comes to your home through pipes. (对画线部分提问)
take, may, floods, lives, are, dangerous, they, because (连词成句)
Ⅲ.Choose the best answers.(选择最恰当的答案。)(本大题共10题，每题1分，共10分)
Water is the most precious resource on our planet.It covers about 71% of the Earth's surface,with approximately 97% being salt water in oceans and only 3%being fresh water. This fresh water exists in different forms:about 68%is trapped in glaciers,30% is underground, and just 2%is found in rivers,lakes,and the atmosphere.
The continuous movement of water on Earth is called the 19 . This natural process begins when the sun's heat causes water to 20 from oceans, lakes, and rivers. The water vapor rises into the atmosphere where it cools and 21 into tiny droplets, forming clouds.When these droplets become too heavy, they fall back to Earth as precipitation(降水), which could be rain,snow,or hail depending on the temperature.
Water is essential for all 22 processes in living organisms.Humans can survive without food for weeks,but can only live 3—5 days without water.Besides drinking,we use water for agriculture,which consumes about 70%of global fresh water.Industries also require large quantities of water for 23 and cooling purposes.
However, water resources are under threat.Many areas face 24 due to climate change and overuse. Pollution from factories and farms has made many water sources 25 . In some developing countries, millions of people lack access to 26 drinking water, leading to waterborne diseases.
To address these challenges,we must take action.Simple measures like fixing 27 pipes can save thousands of liters annually.Using 28 appliances and practicing rainwater harvesting are other effective solutions. Governments should also invest in water treatment plants to ensure clean water for all.
( )19.A.water cycle B.rain circle C.ocean flow
( )20.A.freeze B.evaporate C.disappear
( )21.A.condenses B.expands C.disappears
( )22.A.chemical B.biological C.environmental
( )23.A.cleaning B.manufacturing C.transporting
( )24.A.water shortages B.heavy rains C.floods
( )25.A.cleaner B.polluted C.deeper
( )26.A.warm B.safe C.expensive
( )27.A.new B.leaking C.metal
( )28.A.water-saving B.electric C.smart
IV.Choose the proper words in the box to complete the following passage.Each word can be used only once.(选择最恰当的选项填入空格，每个选项只能使用一次。)(本大题共4题，每题1 分，共4分)
A.transforms B.temperature C.search D.hatch E.migrate
Butterflies go through four stages in their life cycle:egg,larva(幼虫), pupa(蛹), and adult. The first stage is the egg. The female butterfly lays eggs on leaves, which 29 after a few days.
After hatching,the larva(or caterpillar)comes out. The caterpillar eats leaves and grows quickly.As it grows,it sheds its skin several times.This stage lasts for about two to four weeks before the caterpillar 30 into a pupa.
The pupa, also called a chrysalis,is a resting stage.Inside,the caterpillar changes into a butterfly. This process can take from a few days to several months,depending on the 31 . ·
Finally, the adult butterfly emerges. It pumps blood into its wings to prepare for flight. Adult butterflies feed on flower nectar(花蜜)and 32 for mates to reproduce. The life cycle then begins again.
29. 30. 31. 32.
Part 3 Reading and Writing(第三部分 读写)(55分)
V.Reading comprehension.(阅读理解。)(本大题共18题，共40分)
A.Choose the best answers.(根据短文内容，选择最恰当的答案。)(每题2分，共10分)
Water is vital for life,but with growing populations and climate change,we must find smart solutions to use it wisely.Around the world,people are developing creative methods to save water in homes,farms,and cities.
One interesting innovation is“smart showers”.These showers have sensors that turn off the water when you step away,saving up to 50%of water used in a normal shower. Another invention is “greywater recycling systems”,which reuse water from sinks and washing machines to flush toilets or water gardens.
Farmers are also using new technology to reduce water waste.Drones with infrared (红外线的)cameras can detect which parts of a field need more water,helping farmers water only where necessary.Some places even use“fog nets”—large mesh(网状的) screens that collect water from fog in dry areas.
Cities are making changes too. In Singapore, "NEWater"is purified wastewater that is safe to drink.Meanwhile,some schools teach students to track water use with digital meters,encouraging them to save water every day.
Small actions matter too.Fixing leaks,using a bucket instead of a hose to wash cars, and planting drought-resistant plants can all help. If we combine new technology with good habits,we can protect our water for the future.
( )33.What do “smart showers”do to save water
A.Play music while working. B.Turn off water when not in use.
C.Heat water faster. D.Make showers longer.
( )34.How do drones help farmers save water
A.By watering all crops equally. B.By detecting which areas need water.
C.By scaring away birds. D.By planting seeds automatically.
( )35.What is“greywater recycling”
A.Throwing away dirty water.
B.Reusing water from sinks or washing machines for toilets or gardens.
C.Drinking seawater.
D.Collecting rainwater in barrels.
( )36.What is special about Singapore's“NEWater”
A.It comes from melted icebergs. B.It is purified wastewater.
C.It is only for washing clothes. D.It tastes like fruit juice.
( )37.What is one simple way people can save water at home
A.Leaving the tap running while brushing teeth.
B.Using a bucket instead of a hose to wash cars.
C.Taking baths every day.
D.Watering plants at noon.
B.Choose the best words to complete the passage. (选择最恰当的单词完成短文。)(每题2 分，共14分)
Water is essential for life,but many countries are facing severe water shortages. Governments and citizens must work together to 38 this precious resource. Different nations have adopted unique strategies to conserve water.
In Israel, a country with limited natural water,about 90%of wastewater is 39 and reused for agriculture.Australians,who experienced a terrible drought,now use rainwater tanks to collect and store water for daily needs.Meanwhile,Singapore has built advanced technology to turn seawater into drinkable water,reducing 40 on imported water.
Even small habits can make a big difference.For example,turning off the tap while brushing teeth can save up to 6 liters of water per minute.Fixing leaky pipes promptly prevents 41 water waste.Some cities,like Tokyo,have reduced water loss by upgrading old pipes and promoting water-saving appliances.
However, in some regions, water is still wasted due to carelessness or outdated infrastructure.Education plays a key role in changing people's 42 towards water use. If everyone takes action,we can ensure that future generations willhave 43 water to survive and thrive.
Saving water isn't just a national issue—it's a global responsibility.Every drop counts,and every effort 44 !
( )38.A.waste B.protect C.ignore D.pollute
( )39.A.discharged B.cleaned C.buried D.forgotten
( )40.A.pressure B.pleasure C.progress D.pride
( )41.A.unnecessary B.useful C.important D.fresh
( )42.A.attitude B.colour C.taste D.speed
( )43.A.enough B.salty C.dirty D.cold
( )44.A.fails B.matters C.disappears D.confuses
C.Read the passage and complete the tasks. (根据短文内容完成任务。)(第45至49题，每题2分，第50题6分，共16分)
A new fleet of ocean-cleaning drones is being tested to remove plastic waste from the sea. These autonomous(自动的) devices use AI to detect and collect floating debris(碎片), helping to reduce the millions of tons of plastic polluting the oceans. The drones operate day and night, covering large areas more efficiently than human-led clean-up efforts.
Traditional clean-up methods involve ships and nets,which are slow,expensive,and often harm marine life.The drones,however,are designed to avoid wildlife while targeting only plastic waste.Early trials show they can collect up to 100 kilograms of debris per day,making them a promising solution for large-scale ocean clean-up.
One challenge is that strong ocean currents can push debris out of reach,making it harder for the drones to operate effectively.Dr.Hannah Lee,the project coordinator, says her team is improving the drones'navigation systems to handle rough sea conditions. They are also developing ways to recycle the collected plastic into usable materials.
If successful,these drones could play a key role in restoring marine ecosystems and protecting sea life.This technology offers hope for a cleaner,healthier ocean in the future.
Task 1 Answer the questions
How do the drones identify plastic waste in the ocean
Why are drones better than traditional clean-up methods
How much debris can each drone collect daily
What problem do strong ocean currents cause for the drones
What aspect of the drones is Dr.Lee's team improving
Task 2
Explain how ocean-cleaning drones help marine life.(不超过30个词)
V.Writing. (写作。)(共15分)
51. Write at least 50 words about the topic“This is how I save water”.(以“我这样节约用水”为题写一篇不少于50个词的短文，标点符号不占格。)
Suggested questions;
● Why is water important
● How do you save water
● What would happen if there were no water
Keys:
Part 1
I.1.B 2.A 3.A 4.A 5.C 6.B 7.B 8.B 9.B 10.A 11.protect the environment
12.burned or buried 13.less energy 14.limited 15.their waste
Part 2
Ⅱ.16.Does she have to make full use of the water
17.How does water come to your home
18.Floods are dangerous because they may take lives
Ⅲ.19.A 20.B 21.A 22.B 23.B 24.A 25.B 26.B 27.B 28.A
IV.29.D 30.A 31.B 32.C
Part 3
V.33.B 34.B 35.B 36.B 37.B 38.B 39.B 40.A 41.A 42.A 43.A 44.B
45.They use AI to detect floating debris.
46.They are faster,avoid harming marine life,and cover larger areas.
47.Up to 100 kilograms per day.
48.They can push debris out of reach,making it harder for the drones to operate effectively.
49.Navigation systems.
50.They collect plastic waste without harming sea creatures.
V.51. This is how I save water
Water is essential for life—we need it for drinking,cooking,and cleaning.To save water,I take shorter showers,turn off the tap while brushing my teeth,and reuse grey water for plants.If there were no water,plants,animals,and humans couldn’t survive.Saving water protects our future.Let's all do our part!

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