14.　 This is a good place for the ___________ (青少年)to get outclass knowledge.

13.　 It is bad for his health to play computer games ________ the night.(整夜)

12.　 Everyone should _______(遵守)the rules of our school.

11.　 The song __________ (受欢迎)with the young people is about the good time in the old days.

10.　 You should only use this door in an e_______.

9.　　　 How d________ you speak to your mother like that? It’s best manners.

8.　　　 I had to p________ myself against the wall to let them pass.

7.　　　 The masses have great c______ power. They can produce a lot of new things.

6.　　　 Don’t worry. I will give you some s_______ on how to do it.

5.　　　 Using p________ bags is a kind of pollution.