五、新情境 谈论污染与环保 城市环境影响着每个人。在A和B的对话中,他们讨论了城市环境的变化和日常环保行动。请根据上下文和图片提示,补全对话,加入环保讨论。
A：Was your city 1. ?
B：No. Look at the picture. Smoke 2. the air dirty. Our city is clean now.

A：What can you 3. to keep it clean?
B：We can 4. 5. school.
A：Yes. We can 6. the bus to school too.
B：Look at the old picture. 7. made the park dirty.

A：Yes. The park is 8. now. We can 9. more trees. They help 10. the air clean.
B：Your ideas are great.

六、阅读短文,选择正确的答案。
As we all know(众所周知),there's not enough clean water for people in some areas. In a lot of countries,people have to cut down trees for living. So there's nothing to keep water from running away(流失). We have polluted(污染) the land,the river and the air too. So we have to face more and more floods(水灾) and droughts(旱灾). It's time that we must do something useful to protect(保护) our environment. We can plant trees and look after them well. We can save water and ask our parents to do so. We can't drop any litter onto the ground and we should collect it for recycling. If we look after our Earth well today,it will be more beautiful tomorrow.
( )1. According to the passage(根据文章),in many places,people have to ______ for living.
A. drink milk
B. plant trees
C. cut down trees

( )2. If we have no trees,we have to face ______.
A. droughts
B. floods
C. both A and B

( )3. We can't ______ to pollute our environment.
A. plant trees
B. save water
C. drop litter

( )4. The underlined word "recycling" means "______" in Chinese.
A. 骑自行车
B. 循环利用
C. 第二次周期

( )5. Which of the following sentences is NOT true?
A. Planting trees is very important.
B. We shouldn't save water or plant more trees.
C. If we look after our Earth well today,it will be more beautiful tomorrow.