19. The fire spread through the hotel very quickly but everyone ____ get out.

A. had to　　　　 B. would　　　 C. could　　 D. was able to

18. ----Is Jack on duty today?

　 ----It _____ be him. It’s his turn tomorrow.

A. mustn’t　　　　 B. won’t　　　 C. can’t　　 D. needn’t

17. ----May I smoke here?

　 ----If you _____, choose a seat in the smoking section.

A. should　　　　 B. could　　　 C. may　　 D. must

16. We hop that as many people as possible ______ join us for the picnic tomorrow.

A. need　　　　 B. must　　　 C. should　　 D. can

15. The boss has given everyone a special holiday, so we _____ go to work tomorrow.

A. can’t　　　　 B. mustn’t　　　 C. needn’t　　 D. shouldn’t

14. You are wet through. You _______ in the rain.

A. must get caught　　　　　　　　 B. must have caught　　

C. could get caught　　　　　　　 D. must have got caught

13. The weather turned out to be fine yesterday. I______the trouble to carry my umbrella with me.

A. should have taken　　　　　　　 B. could have taken　　　

C. needn’t have taken　　　　　　　 D. mustn’t have taken

12. You cannot imagine that a well-educated lady ______ be that rude to a senior citizen.

A. might　　　　 B. should　　 C. would　　 D. need

11. I _______ have written to him because he phoned me shortly afterwards.

A. ought to　　　　 B. must　　　 C. couldn’t　　 D. needn’t

10. -------Why should you be standing in the rain and not go into the room?

　 -------The door______ though I tried several times.

　 A. doesn’t open　 B. won’t open　　 C. can’t open　 D. isn’t opened