Unit 13 We're trying to save the earth! Section B(1a-1e)课时练习（含答案）

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Unit 13 We're trying to save the earth!
第四课时 Section B(1a-1e)
基础巩固
一、用方框中所给词的适当形式填空。
advantage afford recycle science napkin
1. The WWF calls people to some reusable plastic, iron and metal and put them into good use.
2. And if you have to cough, use your to cover your mouth.
3. I can't to waste my time playing computer games.
4. The president of this factory took part in an important study about transportation last week.
5. One of the of this new machine is that it produces less pollution.
二、用括号内所给词的适当形式填空。
6. It's time for class. Let's stop (talk)!
7. Simon always keeps the window closed when (sleep).
8. David hopes (join)the art club because he likes art very much.
9. The old man used to (like) basketball when he was young.
10. Can you see the cloth bag (make)of old clothes
三、单项选择。
( )11.-Will you buy the house near the lake
-No,I won't.It's too expensive for me.I am afraid I can't it.
A.encourage B.afford C.sell D.remind
( )12.In our school library there a number of books on science and in these years the number of them growing larger and larger.
A.are;is B.is;are C.have;are D.has;is
( )13.-Jack,you look more handsome in a new shirt today.
-Oh，really？I it in a cheap store with my mom.
A.buy B.will buy C.bought D.have bought
( )14.-Your new watch is so nice!When did you buy it
-In October.I it for two months.
A.had B.bought C.have had D.have bought
( )15.You spent too much time on your mobile phone.You are supposed to the time you spend on it.
A.cut off B.cut down C.cut up D.cut away
能力提升
四、完形填空。
Kevin is a special swimmer.He took risks to 16 in very cold places because he wanted people to pay attention to environmental problems.
As a boy, Kevin visited national parks and he learned the Earth is in 17 condition. He felt worried, and he wanted to 18 the Earth. In 2009, he went to swim in water near North Pole(北极) to draw people's attention to the melting glaciers(融化的冰川). Kevin said that the swim was so painful that it would be his 19 time swimming in cold water.In 2016, he heard about a lake in the Himalayas(喜马拉雅山脉). It was formed by melting glaciers.He 20 to swim in cold water again. It was difficult to swim in the lake.The air was so 21 that it was hard to breathe.He told people about his experiences on TV. He wanted people to know that glaciers in the Himalayas are disappearing 22 global(全球的) warming and that there's less water for people in nearby 23 like China, India, and Pakistan.
From Kevin's story, we learn two 24.We learn that people can do a lot of harm to the Earth without realizing it. Also, we learn that if we 25 the way we think, we can do something to protect our environment. With the new way of thinking in our minds, we can enjoy a bright future.
( )16. A. fly B.swim C.run D.skate
( )17.A.right B.safe C. poor D. natural
( )18.A. protect B. leave C. find D.share
( )19.A. last B.great C.free D.long
( )20.A.hated B.agreed C.learned D. decided
( )21. A. fresh B. thin C.clear D. cool
( )22.A. because of B. opposite to C. according to D. instead of
( )23.A.cities B.countries C. towns D.villages
( )24.A.choices B. reports C. reasons D.lessons
( )25. A. ask B. show C. change D. record
参考答案
一、1.recycle 2.napkin 3.afford 4.scientific 5.advantages
二、6.talking 7.sleeping 8.to join 9.like 10.made
三、11-15 BACCB
四、16-20 BCAAD 21-25 BABDC
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