1 . —Must I study medicine and be a doctor like you, Mom?
—No, you ________. You can make your own decision.

A．can’t

B．needn’t

C．wouldn’t

D．mustn’t

2 . —Could I watch TV for a while?
—Of course you ________. But you’d better finish your homework first.

A．can

B．should

C．would

D．must

3 . To learn better, we _________ listen carefully in class and keep thinking actively.

A．could

B．would

C．should

D．might

4 . We ________ know something about the Youth Protection Law to protect ourselves.

A．can

B．would

C．may

D．should

5 . —Excuse me, but we _________ wait in line to get on the subway.
—I’m sorry.

A．might

B．should

C．could

D．would

6 . Children under twelve ________ ride bicycles on the road. It’s dangerous.

A．needn’t

B．mustn’t

C．wouldn’t

7 . Joe asked me, “Will you join us in the coming football match?” (改为间接引语)
Joe asked me ________ I ________ join them in the coming football match.

8 . —Mum, Jerry asked me to watch the ball game after school. Can I go along?
—You _______, but be sure to get home before 10 o’clock.

A．should

B．would

C．must

D．may

9 . My brother is a smart boy. He ________ read when he was five.

A．must

B．should

C．would

D．could

10 . If you want to stay healthy, you ________ exercise regularly.

A．can

B．must

C．would

D．ought to