1 . People ________ smoke in the forest. It’s dangerous.

A．mustn’t

B．needn’t

C．wouldn’t

D．may not

2 . 我们一定要小心用电。
We _________ be careful with electricity.

3 . Children ________ play football on the busy street. It’s quite dangerous.

A．mustn’t

B．must

C．needn’t

D．could

4 . Having an ice-cream in the hot summer ________ be cool.

A．must

B．need

C．can’t

5 . According to the school rules, students ________ bring mobile phones to school.

A．mustn’t

B．needn’t

C．wouldn’t

6 . —Be careful! We ________ cross the road when the light is red.
—I see, mum.

A．needn’t

B．mustn’t

C．wouldn’t

7 . —Must I tell him the change of the schedule (日程安排) right now?
—Yes, you ________. Or he’ll be late for the meeting.

A．will

B．can

C．may

D．must

8 . —Can we walk across the road now?

—No, we ________. We have to wait until the light turns green.

A．couldn’t

B．shouldn’t

C．needn’t

D．mustn’t

9 . —My aunt hasn’t been back to our hometown for years.
—It’s a shame. She ________ miss her family very much.

A．must

B．can

C．has to

D．need

10 . —_________ I finish the homework _________ this Saturday?
—No, you _________.

A．Must; on; need	B．Can; on; mustn’t
C．Must; /; needn’t	D．Can; /; can