8. The baby is too young 　　　　(learn)English.

7. Where 　　　　　your brother 　　　　(study)before he joined the army?

6. Listen!　 Some boys 　　　　(sing) in the next classroom.

5. He said it was nice 　　　　(talk) to you.

4. “When 　　　　　your mother 　　　　(get)Nanjing. ”

　 “I don't know.　 When she 　　　(get) there,　 she　　　 (call) meat once. ”

3. There must 　　　　(be) forty students in your class.

2. People 　　　　(not be)pleased, if you 　　　　(jump) the queue.

1. If it 　　　　(not rain)tomorrow,　 we 　　　　(have) a foot-ball match.

1. A: Excuse me, are you 　　　　(等待) a bus?

B: Yes,　 I am.

A: Why don't 　　　　　(排队等候)?

B: 　　　　(对不起)!　 I want to 　　　　(拜访)a friend in England.

A: In England people must never 　　　　(插队).

　 If you do so,　 other people will not 　　　　(高兴).

2. A: Where are Li Lei and Wang Fei?

B: They 　　　　　　　　　　　(一定在马路上踢足球).

A: Oh,　 it's 　　　　　on the road. (太危险，不能踢球).

　 Let's hurry to call them back.

B: All right.

A: Li Lei,　 you 　　　　(绝对不许)play football on the road.

　 A car 　　　　(可能撞住) you.

15.(　　 ) Where is our Chinese teacher? He 　　　　be in the library.

A. must　　　 B. can　　　 C. mustn't　　　 D. maybe