成人英语三级

7. My wallet is nowhere to be found, I _______ when I was on the bus.

A. must have dropped it B. must drop it

C. should have dropped it D. ought to have dropped it

8. “She must be in the dormitory now.” “No, she _____ be there, I saw her in the classroom a minute ago.”

A. mustn’t  B. couldn’t 

C. can’t  D. wouldn’t

9. Mr. Green ______ my letter, otherwise he would have replied before now.

A. must have received B. must have failed to receive

C. must receive D. must fail to receive

10. I can’t find the recorder in the room. It _____ by somebody.

A. must have taken B. may have taken

C. may have been taken D. should have been taken

11. You ought ______ the matter to the manager the day before yesterday.

A. to report B. to have reported

C. to reporting D. have reported

12. Since this road is wet and slippery this morning, it _____ last night.

A. must rain B. was raining

C. must have rained D. may rain.

答案：7-12 ACBCBC

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