【推荐1】—If we don’t protect nature, some animals ________ die out in the future.
—Yes, we should be kind to nature and try our best to protect the plants and animals.

A．may

B．need

C．can’t

【推荐2】—Look, is that Sally hanging out with her friend?
—It ________ be Sally. She’s having a piano lesson.

A．mustn’t

B．can’t

C．needn’t

D．won’t

【推荐3】----Who’s singing in the garden ?
-----It _______ be Mr.Chen. He has gone to London .

A．can’t

B．must

C．might

【推荐1】—It’s time to go home. But where is Bruce?
—_________ he is cleaning the classroom. Or he ________ in the school library.

A．May be; maybe

B．Maybe; may be

C．May be; may be

D．Maybe; maybe

【推荐2】（2020•昆明三模）Eddie ______ be slow， but at least he doesn't make stupid mistakes．

A．needn't

B．may

C．can't

D．shall

【推荐3】— Is Mr. Smith driving here?
—I’m not sure. He ______ come by subway.

A．may

B．shall

C．need

D．must

【推荐1】—Hi, madam. Can I take the story books out?
—No, my boy. They ________ be taken out of the reading-room. It’s a rule.

A．mustn’t

B．needn’t

C．couldn’t

D．wouldn’t

【推荐2】---May I play computer games now, Mum?
---No, you ______. You’d better______. Music can make you relaxed!

A．needn’t, to listen to music

B．mustn’t, listen to music

C．don’t have to, to listen to music

【推荐3】As a student,you   ________   eat in class.

A．can’t

B．shouldn’t

C．mustn’t

D．needn’t

【推荐1】— 3,000 yuan for such a blouse! You   ________ be joking.
— It is made of silk, so it costs.

A．can

B．may

C．must

D．need

【推荐2】—Difficulties always go with me!
—Cheer up! If God closes a door in front of you, there ________ a window opened for you.

A．would

B．must

C．should

D．can

【推荐3】—Without eating anything for a whole day, you _________ be hungry.
—You’re right! I feel like I can eat a cow!

A．must

B．can’t

C．should