4.I think ______ ________(空气污染)is the most serious problem in the world.

3.The more trees we ______ _____(砍倒)，the more punishments we will get.

2.He seldom exercise, _____ _____ _______(结果)，he is not in a good health.

1.Our government has done something to _______the environment _____(防止)being polluted.

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教后反思：

Unit 2 Loving our planet　 Topic2 All these problems are very serious

Section A

教师寄语：The important thing in life is to have a great aim, and the determination to attain it学习目标：

1.重点词组，句子．2.更进一步认识保护环境的重要性，并能描述污染的危害．

I.前置测评：根据汉语填空：

10. I first met Li Hong three years ago .She ________ at a radio shop at that time .

A. Has worked　 B. had worked C.　 was working D.　 had been working .

9. Everyone must make a contribution ________ protecting our environment .

　A. For　 B. with C.　 to　 D. of　

8. The good idea ________ him in a flash .

　A. come to　 B. comes into　 C. comes to D.　 comes from　

7. How long is it _________ you came to the university?

A. After　 B.　 since C.　 until　 D. from　

6. ---- __________ are the animals in the cage given food ?

---- Once a day .

A. How long　 B. How often　 C.　 How soon　 D. How much