17. ---I didn’t see her yesterday.　　 ----Oh, But you ______.

A. must have　　 B. ought to　　 C. should have　　 D. cannot have

16. they must have been here the day before yesterday,_____?

A. mustn’t they　　 B. weren’t they　　 C. mustn’t have they　　 D. had they

15. She _____ the film. She knows nothing about it.

A. can’t see　　 b. can’t have seen　　 C. must see　　 D. mustn’t have seen

14. --- Nancy _____ the letter from her mother.　 ----No, she can’t have. The postman haven’t come.

A. can receive　　 B. can have received　　 C. must have received　　 D. must receive

13. I don’t think he _____ a new bike.

A. need to buy　　 B. needs buy　　 C. need　　 D. need buy

12. Tom _____ show his exam results to his parents.

A. dare not　 B. dared　 　C. dare to　　 D. dares not to

11. Let’s clean the classroom,_____?

A. won’t you　　 B. shall we　　 C. do we　　 D. will not you

10. Children ______ in public very often.

A. should be praised　 B. shouldn’t have praised　 C. shouldn’t　 have been praised　 D. shouldn’t be praised

9. I was really anxious about you. You _____ home without a word.

A. mustn’t leave　　 B. shouldn’t have left　　 C. couldn’t have left　　 D. needn’t leave

8. ---What happened to the young trees we planted? ---The trees _____ well, but I didn’t water them.

A. might grow　　 B. needn’t have grown　　 C. would grow　　 D. would have grown