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(共38张PPT)
主题十 自然生态　
主题词汇串记
一、阅读理解
A　热点素材·学科融合
主题： 人与自然——热爱与敬畏自然　　
情境： 看植物如何“喝”水
主题语篇专练
Aim：
　　To prove that plants take in water. It can also show how plants “drink” water.
Materials：
◆one stick of celery (芹菜) with leaves
◆liquid food colouring (液态食用色素) (red or blue is best)
◆one empty glass　◆a pair of scissors　◆water
Method：
Step 1： Use the scissors to cut about 2cm off the bottom of the celery stick.
Step 2： Fill the empty glass with about 30 ml of water.
Step 3： Add 10 ml of food colouring to the water.
Step 4： Pick up the celery stick you have just cut. Place the end of it into the water.
Step 5： Leave the celery stick in the water for about ten hours.
Results：
　　After ten hours， the leaves of the celery became colourful. The plant took in 22 ml of the coloured water. Colourful patterns appeared on the leaves and the stem (茎).
Conclusion (结论)：
　　The experiment shows that plants take in water through their stems. The water travels up the stem and into the leaves. The colour on the leaves and the stem shows the way water goes inside the plant. This explains how plants “drink” water.
Try It Another Way：
　　You can use white flowers instead of celery， and then you can get amazing， colourful flowers. The experiment results are the same.
(　　)1.What should be done after adding the food colouring to the water？
A.Cut the bottom of the celery stick.
B.Leave the celery stick for ten hours.
C.Place the celery stick into the water.
D.Pour out some of the water from the glass.
C
(　　)2.新考法·图文转换　According to the text， how much coloured water is left after about ten hours？
A B
C D
B
(　　)3.What happened at the end of the experiment？
A.The leaves of the celery were still green.
B.The water became clear with no colour.
C.The food colouring went into the leaves.
D.The celery died and became yellow after ten hours.
C
(　　)4.Why are white flowers a good choice to take the place of celery？
A.Because they grow faster than celery sticks.
B.Because the colour change would be easier to see.
C.Because white flowers are easier to find than celery.
D.Because they need more water than celery to stay alive.
B
(　　)5.新考法·文章体裁　What is the text？
A.A science report.
B.A growth diary.
C.A survey result.
D.A cooking instruction.
A
B
主题：人与自然——与自然和谐共生　　情境：大自然的授粉使者
　　Bees are among the most important insects on Earth. They help plants grow by carrying pollen (花粉) from one flower to another. In fact， about one third of the food we eat depends on bees. Without them， many fruits， vegetables and nuts (坚果) would no longer appear on our plates.
There are more than 20，000 kinds of bees in the world. The best known is the honeybee. A honeybee family can have as many as 60，000 members. Each family has a queen bee， whose main job is to lay eggs. The worker bees are all female (雌性)， and they take care of everything else. They collect sweet liquid and pollen from flowers， build the honeycomb， and guard their home. The male bees have just one task—to help the queen produce new bees.
The way bees communicate is fantastic. When a worker bee finds a place with plenty of food， she flies back home and performs a “waggle dance (摇摆舞)”. This dance tells the other bees which way to go and how far the food is. A scientist named Karl von Frisch discovered this amazing skill and later won a Nobel Prize for his work.
Sadly， the number of bees is falling fast these days. The main reasons include the heavy use of chemicals on farms， the loss (损失) of bees’ homes， and changes in the world’s weather. Scientists warn that if we do nothing， bees could disappear forever.
So what can we do？ Planting flowers that bees love in our gardens， saying no to harmful chemicals， and buying honey from local beekeepers are all easy ways to begin. Every small step matters when it comes to saving these tiny but truly important lives.
(　　)6.What percentage of the food we eat depends on bees？
A.About one tenth.
B.About one third.
C.About one-half.
D.About two thirds.
B
(　　)7.What is the main job of worker bees？
A.To lay eggs.
B.To help the queen produce eggs.
C.To collect food and protect the home.
D.To perform the “waggle dance” only.
C
(　　)8.What does a bee’s “waggle dance” communicate？
A.The weather condition.
B.The position of food.
C.The danger from beekeepers.
D.The health of the queen.
B
(　　)9.Which of the following is NOT a reason why there are fewer bees？
A.The loss of the places bees live in.
B.The large number of worker bees.
C.The changes in the world’s weather.
D.The heavy use of chemicals on farms.
B
(　　)10.新考法·作者态度　What is the writer’s attitude toward bee protection？
A.Disappointed.
B.Doubtful.
C.Not interested.
D.Hopeful but worried.
D
→ →
第10题解题步骤：
1.文章介绍了蜜蜂的重要性及当前的生存危机，同时提出了具体的保护措施，情感基调是“_______→_______”的转变；
定位态度线索
归纳情感方向
匹配选项态度
担忧
希望
2.第四段中的“________， the number of bees is falling fast these days.”和“Scientists warn that if we do nothing， bees could disappear forever.”表达了对蜜蜂处境的________；最后一段中的“Every small step matters when it comes to saving these tiny but truly important lives.”则语气积极、充满希望，直接呼吁行动；
3.作者既呈现了危机，又提出了解决方案，态度是“担忧但充满希望”，故选______。
Sadly
担忧
D
二、补全对话
(Two students are having a discussion after a geography class about famous mountains in China.)
A： Wang Fang， I’m really excited about what we have learned today. How about you？
B： 1.___________________________________. There are so many great mountains， like Mount Tai and Huangshan.
A： I like the Qinling Mountains the most. 2.____________________
_______________？
B： Not really. How special are they？
Me too/ So am I/ I feel the same way/…
Do you know how
special they are
A： Well， the Qinling Mountains are the dividing line between North and South China. They are known as the “natural boundary (分界线)” of our country.
B： Really？ 3.__________________________________________？
A： It means they divide China into two parts. The climate in the south is warm and wet， while the north is dry and cold.
B： Oh， I see！ 4._________________________________________？
What does that mean/ What do you mean by that/…
Anything else/ What else/ Can you tell me more/…
A： The Qinling Mountains are home to many rare species (稀有物种)， like pandas.
B： Wow， that’s amazing！ I never knew they were so meaningful. I really want to learn more about them now.
A： Maybe we can look for some books about them in the library after school.
B： 5.________________________！
Good idea/ Sounds great/…
Task 1-完形填空
主题：人与自然——热爱与敬畏自然　　情境：冷杉树的领悟
重难语篇三级拓展练
　　A long time ago， Mother Nature gave each tree a different purpose. But she did not share her 　1　 with the trees.
Fir Tree had three friends—Maple， Oak， and Elm. When the first fall arrived， Maple’s， Oak’s， and Elm’s
leaves turned orange， red， and yellow. 　2　， Fir Tree’s leaves stayed green.
(　　)1.A.feelings B.illnesses C.reasons D.situations
(　　)2.A.However B.Perhaps C.Besides D.Soon
C
A
Fir Tree complained (抱怨) to Mother Nature， “I don’t 　3　 my leaves. I want them to change color like my friends’ leaves.”
“Be 　4　，” Mother Nature replied. “You will learn your purpose.”
(　　)3.A.cut B.hide C.like D.protect
(　　)4.A.careful B.patient C.serious D.brave
C
B
So Fir Tree waited. The temperature 　5　 even more. Maple’s， Oak’s， and Elm’s leaves fell from their trees. Only Fir Tree’s green leaves remained. Soon the ground was covered with snow. The sun tried to 　6　 but it was still cold.
Again， Fir Tree said to Mother Nature， “Why am I different？ I seem to be stuck in one 　7　 of life！”
(　　)5.A.changed B.continued C.moved D.dropped
(　　)6.A.set B.smile C.shine D.appear
(　　)7.A.chance B.lesson C.truth D.period
D
C
D
“Take it easy，” Mother Nature replied. “Soon you will 　8　 your purpose.”
Just then， Squirrel (松鼠) appeared near the 　9　. She was very cold. When she went inside the forest， she saw Maple. She 　10　 if she could build a warm home in Maple’s branches (树枝).
(　　)8.A.realize B.search C.consider D.express
(　　)9.A.river B.field C.mountain D.forest
(　　)10.A.asked B.explained C.decided D.knew
A
D
A
Maple said he didn’t have any leaves. She asked Oak and then Elm. Both said the 　11　 thing. Squirrel then came to Fir Tree.
“Excuse me，” she said. “　12　 I build a home in your branches？”
“　13　！” said Fir Tree. Squirrel ran up Fir Tree’s branches to build her home. Soon she fell asleep in her warm and comfortable new home.
(　　)11.A.first B.same C.only D.most
(　　)12.A.Need B.May C.Must D.Should
(　　)13.A.Of course B.Well done C.Good luck D.Take care
B
B
A
Fir Tree 　14　 understood that his green leaves could provide shelter (庇护) for animals in winter. From that moment on， Fir Tree was 　15　 to be different. Now， he remains proud of his evergreen leaves.
(　　)14.A.easily B.certainly C.finally D.politely
(　　)15.A.afraid B.sorry C.mad D.glad
C
D
Task 2-阅读理解
(　　)16.Why did Fir Tree complain to Mother Nature at first？
A.He couldn’t stand the cold winter weather.
B.He had no friends to play with in the forest.
C.He had to try hard to keep his leaves green.
D.He didn’t like his leaves and wanted to change color.
D
(　　)17.Why couldn’t Maple， Oak and Elm provide a warm home for Squirrel？
A.They were asleep in winter.
B.They didn’t want to help small animals.
C.Their branches were not strong enough.
D.They had no leaves to keep the home warm.
D
(　　)18.新考法·人物情感　How did Fir Tree’s feelings change during the story？
A.Proud→sad→calm.
B.Bored→excited→peaceful.
C.Unhappy→worried→proud.
D.Angry→surprised→worried.
C
(　　)19.新考法·写作手法　How does the writer organize the text？
A.In the order of time.
B.In the order of space.
C.From opinions to facts.
D.From reasons to results.
A
(　　)20.What can we learn from the story？
A.It’s important to get along well with friends.
B.Evergreen trees are more useful than other trees.
C.Animals always depend on trees to live in winter.
D.Everything has its own special value and purpose.
D
Task 3-语言积累
一词多义：为下列句子中的画线单词选择合适的汉语意思
fall　A.n. 秋天　B.v. 落下；掉落　C.n. 跌落　D.v. 减少；下降
(　　)21.When the first fall arrived， Maple’s， Oak’s， and Elm’s leaves turned colorful.
(　　)22.The little boy had a bad fall and hurt his knee on the way home.
(　　)23.The temperature fell quickly in the night.
(　　)24.Maple’s， Oak’s， and Elm’s leaves fell from their trees.
A
C
D
B
从上文中找出下列短语
25._______________被……覆盖
26._______________为……提供……
27.____________为……感到骄傲
用上面的短语完成下列句子
28.That’s a beautiful piece of work. You should _____________ it.
29.In winter， the ground and the houses __________________ thick white snow.
30.This kind man always tries his best to _________ food and clothes ______ homeless people.
be covered with
provide…for…
be proud of
be proud of
are covered with
provide
for

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