4. I don't think he ____________ there as no one seems to have seen him.( )
A: should be
B: can be
C: might have been
D: could have been
A: should be
B: can be
C: might have been
D: could have been
举一反三
- Don't wait for me. I _________ a few minutes late.( ) A: might be B: can have been or C: might have been D: can be
- 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
- –What do you think the noise was? –It (__) a cat. A: may be B: might be C: could have been D: might have been
- He fifty when I met him the first time. A: must be B: must have been C: should be D: should have been
- I ___ him the answer ___ possible, but I was so busy then. A: could tell, if it had been B: must have told, were it C: should have told, had it been D: should have told, should it be