Unit 2 助动词、情态动词(三) 7. Research findings show we spend about two hours dreaming every night, no matter what we _____ during the day. A. should have done B. would have done C. may have...
Unit 2 助动词、情态动词(二) 4. With all this work on hand, he _____ to the cineman last night. A. mustn't go B. wouldn't go C. oughtn't to go D. shouldn't have gone 5. You _____ all those cal...
Unit 2 助动词、情态动词(一) 1. The room is in a terrible mess; it _____ cleaned. A. can't have been B. shouldn't have been C. mustn't have been D. wouldn't have been 2. You _____ her in her o...