A: can’t have been
B: mustn’t have been
C: wouldn’t have been
D: shouldn’t have been
举一反三
- The room is in a mess; it _____ cleaned. A: can’t have been B: shouldn’t have been C: mustn’t have been D: wouldn’t have been
- Section B 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
- 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: will have been waiting
- The room is in a terrible mess; it __________ cleaned. A: can’t have been B: couldn’t be C: may have been D: would be
- Most of the students failed in the final exam. It ______ easy. A: can't be B: shouldn't be C: mustn't have been D: couldn't have been
内容
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Most of the students failed in the final exam. It ______ easy. A: can't be B: B. shouldn't be C: mustn't have been D: D. couldn't have been
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He ____ Tokyo, for I saw him a short time ago. A: must have gone to B: mustn't have been to C: can't have gone to D: can't have been to
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— The door was open.— It _____ open. I had locked it myself and the key was in my pocket. A: can't be B: mustn't C: can't have been D: mustn't have been
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All of us would have enjoyed the party much more if there____ quite such a crowd of people there. A: A. weren’t B. hasn’t been C. hadn’t been D. wouldn’t have been B: hasn’t been C: hadn’t been D: wouldn’t have been
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He has been so hard working. He ___ failed in the exam. A: couldn't have B: wouldn't have C: mustn't have