1. I can hear the Browns’ phone bell ring but no one is answering it; they ______ be at home.

A. can’t

B. mayn’t

C. probably not

D. shouldn’t

2. Professor Wang ______ be in New York because I met him in town just now.

A. can’t

B. might not

C. may not

D. may

3. It is going to rain. You ______take your umbrella with you.

A. had better to

B. would rather to

C. would rather

D. had better

4. I would rather ______with you. A. not to go

B. to not go

C. to go

D. not go

5. They will get well soon. You ______ worry.

A. can’t

B. couldn’t

C. mustn’t

D. needn’t

11. -Shall I tell Ann the test result? -No， you ______. She’s already got some report.

A. wouldn’t

B. needn’t

C. mustn’t

D. shouldn’t

12. To travel from England to Scotland you ______ a passport.

A. mustn’t have

B. haven’t got

C. don’t need

D. needn’t

13. The garden requires_______.

A. watering

B. being watered

C. to water

D. having watered

14. -Why isn’t John in class? -He ______be sick. Or he’d have been here already.

A. should

B. may

C. must

D. would

15. The streets are all wet. It ______ during the night.

A. must be raining

B. must have rain

C. must have rained

D. had to rain