The room is in a terrible mess; it ________have been cleaned.
| A．can’t | B．mustn’t | C．shouldn’t | D．wouldn’t |
Robert is said _____ abroad, but I don’t know what country he studied in .
| A．to have studied | B．to study |
| C．to be studying | D．to have been studying |
_____ him and then try to copy what he does .
| A．Mind | B．Glance at | C．Stare at | D．Watch |
------ Alice, you feed the bid today, _______ ?
------ But I fed it yesterday .
| A．do you | B．will you | C．didn't you | D．don't you |
—You seem to show interest in cooking.
—What? _________, I'm getting tired of it.
| A．On the contrary | B．To the contrary |
| C．On the other hand | D．To the other hand |
—I believe we've met somewhere before.
—No, _________.
| A．it isn't the same | B．it can't be true |
| C．I don't think so | D．I'd rather not |