题目内容：

How do you go to school? Some students may answer， “By car”. Maybe some others will look at them through green glasses (羡慕地).

You       feel bad if you have no cars. It’s true that cars are       . Many people find it hard to think about      life will be like if they have no cars. But now more people know that too many cars bring great       . They make streets too       .

People are trying to stop pollution (污染) from cars. One way is to make          cars. But it       much money to make these cars. And more people think about better ways. We can       our lifestyle. A lot of Americans go to work       bike now. Riding bikes is clean and healthy. It helps people get strong. Let’s try together! I hope we can live in a green world with no pollution       .

1.A. can’t  B. needn’t  C. won’t  D. aren’t

2.A. interesting B. important     C. difficult D. dangerous

3.A. how  B. what      C. why  D. where

4.A. lessons       B. fun   C. skills  D. problems

5.A. small  B. clean      C. busy  D. modern

6.A. green  B. red   C. yellow  D. white

7.A. takes  B. spends      C. pays  D. costs

8.A. have  B. change      C. enjoy  D. make

9.A. on  B. by   C. with  D. ride

10.A. something B. some days     C. some day D. any day