13. He was a good swimmer so he _________ swim to the river bank when the boat sank.

A. could　　　　　 B. might　　　　　　　 C. should　　　　　　 D. was able to

12. 一I heard they went skiing in the mountains 1ast winter．

　　 一It　　　　 be true because there was littIe snow there．

A. mustn't　　　　 B．couldn't　　　　 C．may not　　　　 D．won't

11. The weather in the south is generally warm, but it _____ be very cold sometimes.

A. may　　　　　 　　 B. shall　　　　　　　　 　　 C. will　　　　　　　　　 　　 D. can

10. Being examined twice a year，whether it is a car or a bus or a truck，is the rule that every driver _______obey in this city.

A. shall　　　　　　　　　 B. can　　　　　　　　 　　 C. ought to　　　　　　　　　 D. need

9. Most of the big hotels were full at this time of year, but finally we _________ finda room in one of those small guesthouses near the station.

A. ought to 　　　　　 B. could　　　　　　　　 C. were able to　　　　　　　 D. might

8. -Are you coming to Jeff’s party?

-I’m not sure, I　　　　 go to the concert instead.

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

7. Yesterday , Jane walked away from the discussion. Otherwise , she　　　　

something she would rather regret later.

A. had said　　　 B. said　　　　　　 C. might say　　　　　 D. might have said

6. English lessons are in strong demand in the United States, and people ____ wait for an opening

　 A. have to B. may have to　　　 　　 C. must　　　　　　　　 D. may

5. ----I’ve told her many times , and she still forgot about it!

　 ---I understand． It’s true that she _______ be very forgetful sometimes．

A． can　　　 　 B． should　　　 　　　 C． ought to　　　 　　 D． must

4. Look! Tom is too sleepy to work .He __ up watching TV.

A. mustn't have stayed　 B. shouldn't have stayed　 C. mustn't stay　 D. ought not to say.