Somebody ______ here only this morning.
A: must be
B: can be
C: must have been
D: should have been
A: must be
B: can be
C: must have been
D: should have been
举一反三
- He is an hour late. He _____ by fog. Of course, that's only a possibility. A: may have been delayed B: should have been delayed C: can have been delayed D: must have been delayed
- He must have had an accident, or he ________ here then. A: would be B: had been C: should have been D: could be
- He must have had an accident, or he ______ here then. A: would have been B: had been C: should be D: could be
- Where is John? - He _____ in the library. A: should be B: must be C: can be D: must have been
- He did not attend the meeting yesterday. He______ill. A: must be B: must have been C: should be D: should have been