4.　　　 Let m i_______ myself; my name is Simpson.

3.　　　 Whose f_______ is it to have broken the windown?

2.　　　 Traffic in the city was i________ by a snowstorm.

1.　　　 It is bad m_______ to speak with your mouth full.

15.　 Is it necessary to have a dialogue between ___________ (成年人) and teenagers.

Unit 6

14.　 The news is now on the ________ (播送).

13.　 We are always _________ (鼓励) to have our own opinions.

12.　 he boy _______(看上去) very strong.

11.　 The news is now on the _________ (播送)。

10.　 With the development of __________(工业), the environment is becoming worse.