The professor must have been to London,________ he?
举一反三
- He looks tired. He ______ a sleepless night. A: must have been B: must have had C: must be D: must have
- He did not attend the meeting yesterday. He______ill. A: must be B: must have been C: should be D: should 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
- 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