【推荐1】—Look at the boy running on the playground. Is he David?
—It ______ be him. I saw him go to the teachers’ office just now.

A．can

B．must

C．can’t

D．mustn’t

【推荐2】— May I use your mobile phone for a while, Mum?
— No, you      . You have already used it to play for two hours.

A．shouldn't

B．needn't

C．mustn't

D．won't

【推荐3】—Must I take part in the meeting?
—________, if you have no time.

A．Yes, you must

B．No, you mustn’t

C．No, you needn’t

【推荐1】The Chinese policemen in the film Formed Police Unit are so brave that we ________ praise them too much.

A．can’t

B．mustn’t

C．shouldn’t

D．needn’t

【推荐2】—You ________ drive so fast, Mike! It’s dangerous.
—You’re right. But I ________ get to the museum by 10 o’clock.

A．shouldn’t, have to

B．couldn’t, must

C．mustn’t, may

D．needn’t, can

【推荐3】—Mrs. Smith, can I hand in my paper now?
—Wait. There are still a few minutes left. Your answers ________ be right, but it’s better to check to make sure.

A．must

B．might

C．shouldn’t

D．can’t

【推荐1】When you see your right moment，you __________let it pass you by.

A．need

B．needn't

C．must

D．mustn't

【推荐2】— Sir, may I park my car here?

— Sorry, look at the sign. You ________ park your car here.

A．couldn’t

B．may

C．mustn’t

D．needn’t

【推荐3】—Daniel, you ________ spread the books all over the floor. It is a rule.
—Sorry, I won’t.

A．couldn’t

B．needn’t

C．wouldn’t

D．mustn’t