1.—— How do you go to school?   ——__________

Walks  By a bike  On foot   Cyele 

2. The baby is only three months old, so it's __________  to make him walk.

possible   impossible    possibly      impossibly 

3.Before you throw the bottle into the water, you must _______________ it, so that it can keep dry inside.

open     close     seal      turn off 

4. We hope that there will be ___________ air pollution in the future.

no    some  a few     a little

5.There is enough ___________ for everyone to eat.

room milk food  water

6.Tim looked so ___________ because his dog was dead.

happy happily sad  sadly

7.The teacher didn't leave the hall ___________ every strdent got on the bus.

before      after    since      until 

8.Perhaps people ___________ enough water to drink in the future.

will have not     will not have    cave not      will not  

9.You'd better stop  ________ . It's bad for your health.

smoke     to smoke    smoking      smokes 

10.You can see __________  in the mirror.

you your  yoursp  yourself 

11.What do you think will  _______ in ten years?

happen      take    go      cost 

12.——Perhaps there will not be any pollution in the future.
——______

That's OK.    I hope that    I think so     I don't know