— We did not see him at the lecture yesterday．
— You _______ him, since I went to an international conference with him．
| A．mustn’t have seen | B．can’t have seen |
| C．couldn’t see | D．needn’t have seen |
Either you or one of your students______ to attend the meeting that is due tomorrow.
| A．are | B．is | C．have | D．be |
By the time the police came to rescue the old woman, she _______for four days under the house.
| A．buried | B．had buried | C．had been buried | D．has been buried |
Recently I bought an ancient vase, ______ , I think, was quite reasonable.
| A．which price | B．the price of whose |
| C．its price | D．the price of which |
A terrible earthquake and tsunami struck northeastern Japan, _______ almost 28,000 people to be dead or missing.
| A．caused | B．to cause | C．causing | D．having caused |
In some places in Yunnan, women are expected to run society and earn money ______ men work at home and raise their children.
| A．but | B．while | C．because | D．though |