人教高中英语必修三Unit4课后习题（含答案）
Unit 4 同步练习
一、词组翻译。
1.在太阳系____________________及时，终于____________________
2.不同于地球____________________是……的基础___________________
3.连锁反应____________________下蛋________________________
4.轮到某人_____________________挡住光线_____________________
5.产生_____________________乘_________________________
6.振奋_______________________既然_______________________
7.爆发______________________当心，提防____________________
8.冷却______________________对……有害______________________
9.阻止，制止_______________________一般而言______________________
10.引起关注______________________灭绝_______________________
11.全球变暖______________________开始时__________________________
12.熟悉，理解，掌握_______________________跌倒______________________
reaction英语二、单词拼写
1. A v_______________ storm hit the country and damaged many buildings.
2. The moon's p____________ on the Earth's oceans creates the tides.
3. Eating too much junk food is h________________ to your health.
4. Many people believe that life e________________ on other planets besides the earth.
5. She spent the afternoon f_________________ on her back in the pool.
6. These flowers will not grow in a cold c_______________.
7. It's hard to breathe on top of the mountain, so you'd better take an o____________ bottle.
8. The new owners have tried to give the restaurant a more family-friendly a____________.
9. U_____________ most students in my class, I don't like PE lessons.
10. The p______________ of the famous actor made all his fans excited.
11 Hawking is one of the most famous ___________(physic) in the world.
12 ____________(like) China, Australia is in Winter when China is in summer.
13 The young man speaks ________(gentle) and everyone likes him.
14 There is too much ____________(violent) on TV which is bad for the health of the young.
15 Some factories produce __________(harm) gases, which pollutes our _________(大气层).
16 The __________(气候) is very pleasant in Kunming all the year round. w.w.w.k.s.
17 The discovery of __________(重力) is so important for science.
18 We can see live programs from America because of man-made ___________(卫星)
19 We are trying to build a better social ____________(体系).
20 Though the __________(理论) was not right, it affects many people at that time.
三. 用所给短语的正确形式填空
2. Stick to your theory and I believe you will surely gain success _________.
3. Seven _______ _______ seven makes forty-nine.
4. Some mammals give birth to their young by _____________.
5. He was walking on the road when suddenly a car rushed by, raising ____________.
6. In class the students answered the teacher’s questions _____ ______ .
7. Unlike human beings, rabbits can _____ ______ ______ seven to ten babies at a birth.
8. We all know that water and oxygen _____________the development of life.
9. We human beings do something___________our environment, causing lots of pollution.
10. Thus, ___________, the environment no longer provides us humans with good farmland to grow
crops on, causing some to starve.
四、单项填空
1. Mammals _________when animals harmful to them disappeared.
A. multiplied
B. lessened
C. existed
D. spread
2. Reptiles produced young generally by _______eggs.
A. lying
B. lied
C. laying
D. laid
3.Because of the sudden change of the weather, the dinosaurs were unable to _______themselves
________ altogether.
A. protect, against disappeared
B. keep, becoming extinct

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