Ⅰ. 用can, have to/must, can't/mustn't完成句子
1. We obey traffic rules for our safety.
2. You play football in the classroom.
3. Drivers stop when the traffic lights are red.
4. We litter everywhere.
5. If you have any questions, you ask your teachers for help.

1. must/have to 2. can't/mustn't 3. must/have to 4. mustn't/can't 5. can

1. Students be on time for class.

A.can
B.must
C.may

1. B

2. You park your car here. It's a no-parking area.

A.needn't
B.don't have to
C.mustn't

2. C

3. —What are the library rules?
—We keep quiet.

A.must
B.can't
C.don't have to

3. A

4. You smoke in the hospital. It's very dangerous.

A.can't
B.have to
C.must

4. A

5. There is no bus here. I go back home on foot.

A.mustn't
B.have to
C.can't

5. B

知识点一 order的用法
1. Everything in her room is always in good (顺序).
2. —Good afternoon.
—Yes. I'd like a bowl of beef noodles, please.
A. May I take your order?
B. Do you have an order?
C. What don't you like?
D. What do you look like?
3. In order for the meeting, my sister had to(不得不)get up early this morning.
A. not to be late
B. not being late
C. to be late
D. not be late
4. The doctor ordered you (be)quiet.

1. order 2. A 3. A 4. to be