北大绿卡九年级英语全册 Unit 13 We’re trying to sa

Unit 13 We’re trying to save the earth
【课前预习】
1.水污染________________
2.空气污染____________________
3.噪音污染________________________
4.一个有创意的大脑________________________
5.开一个小店________________________
6.更受欢迎的作品________________________
7.给他人带来欢乐________________________
【答案】 1. water pollution 2. air pollution 3. noise pollution 4. a creative mind 5. open a small shop 6. more popular works 7. bring happiness to others
【自主学习】
要求：阅读教材书103-104页内容完成下列句子。

1.在环境方面我们已经看到了许多的改变。

_______________________
2.河流被工厂污染了_______________________________
3.空气污染变的越来越糟糕。

______________________________________
4.人们应该更多乘坐公共交通工具。

_________________________________________
【答案】
1.We have seen many changes in the environment.
2. The river is polluted by factories.
3. The air pollution is getting worse and worse.
4. People should take public transportation more.
【合作探究】
利用本单元学习的内容，结合你所在的城市或者乡镇，说说你们那里是否有环境问题，是什么问题，及什么原因造成的。

然后提出可行的解决办法。

【答案】
这篇短文首先要介绍你所在城市存在有哪些环境问题，是谁造成的这些问题，然后提出解决这些环境问题的方法和措施，可以结合3a中列举的问题和前面学过的解决办法来完成
Environmental problems are becoming more and more serious all over the world. So is our city.
With the development, there are too many cars on the streets in our city. Cars have caused air pollution.
Black smoke and poisonous gas are given off by factories. Factories also put waste into the river. And wherever we go, we can find rubbish. Now more and more people have realized these problems.
I think that governments should close down the factories and develop laws to stop people from driving cars every day. I suggest everyone in this town should help to clean up the river and the streets. We should call on everyone in the town to throw rubbish in the dustbins.
I hope the problem will be solved in the near future and our home will become better and better.
【课堂反馈】
1．You ______ be polite to the old man.
A. should
B. can’t
C. might
D. mustn’t
【答案】A
【解析】
试题分析：句意“对老人应该有礼貌。

”should“应该”；can't“不能”；might“可能”；mustn't“禁止，不许”。

故选A。

考点：考查情态动词。

2. Finish your homework first, then you'll surf the Internet for half an hour.
A. can
B. need
C. be able to
D. may
【答案】C
【解析】
试题分析：句意：先完成作业，然后你可以上网半小时。

从句意看表允许，所以排除B，又由于是一般将来时，will后面接动词原形，can和may没有将来时，故选C。

考点：考查情态动词。

3. Why does Liu Tao look all day long?
A. sleepy
B. sleep
C. to be sleepy
D. sleeping
【答案】A
【解析】
试题分析：句意：为什么刘涛整天看起来很困？look在本句中为系动词，所以后面通常跟形容词做表语；故选A。

考点：考查形容词。

4. He is a ___________ student, and he always listens to the teachers ___________.
A. careful; careful
B. careful; carefully
C. carefully; carefully
D. carefully; careful
【答案】B
【解析】
试题分析：句意：他是一个认真的学生，并且他总是认真听老师讲课。

Carefully认真地，副词，用来修饰动词; careful认真的，形容词，做表语或修饰名词。

第一个空修饰名词，第二个修饰动词听的方式，结合句意及结构，故选B。

考点：考查形容词和副词的用法。

5. --- Why did you buy two pairs of shoes?
--- It was so hard to choose which was________, so I took them both.
A. better
B. the better
C. worse
D. the worse
【答案】B
【解析】
试题分析：句意：---你为什么买两双鞋子？---很难选择哪一双更好，所以我两双都买了。

两者中更好的应用the+比较级。

根据题意，故选B。

考点：考查形容词的用法。

6. ---Oh, Mrs. King, your dress looks nice. Is it new?
---No, I ______it since two years ago.
A. had
B. bought
C. have had
D. have bought
【答案】C
【解析】
试题分析：由since引导的时间状语从句或短语，主句用完成时，结构为have或has+过去分词，同时一般不用短暂动词，buy为短暂动词，故选C。

考点：考查现在完成时。