Look, the trees are fallen. There _______ a strong wind.
A: must be
B: should have been
C: must have been
D: could be
A: must be
B: should have been
C: must have been
D: could be
举一反三
- He did not attend the meeting yesterday. He______ill. A: must be B: must have been C: should be D: should have been
- Somebody ______ here only this morning. A: must be B: can be C: must have been D: should have been
- 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
- He must have had an accident, or he ______ here then. A: should be B: B. would be C: could have been D: D. would have been