The room is in a terrible mess; it ____ cleaned.(1996.6.CET-4)
A. can’t have been
B. shouldn’t have been
C. mustn’t have been
D. wouldn’t have been
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He ____ unwisely, but he was at least trying to do something helpful.(1999.TEM-4)
A. may have acted
B. must have acted
C. should act
D. would act
We thought that they ____ home by five o’clock, but there was no reply when we phoned.
A. would have got
B. will have got
C. may get
D. might get
Surely nothing ____ going on there at 11 o’clock last night.
A. could be
B. must be
C. need be
D. shall be
He said he ____ for 20 years by this summer.
A. will have been teaching
B. could have taught
C. would have been teaching
D. should have been teaching
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