21. The fifth generation computers, with artificial intelligence, _C_ and perfected now.
A) developed B have developed C are being developed D will have been developed
22. This ticket _C_ you to a free meal in our new restaurant.
A gives B grants C entitles D credits
A,B两项都要加双宾语,结构为:gives / grants sb. sth.
entitle sb. to sth. 使某人有权得到某物; credit A to B 相信A是由B造成的。
相信飞机失事是由飞行员错误造成的。 Credit the crash to the pilots mistake.
crash 坠落,坠毁; collision 碰撞。
we are sorry, very sorry, terribly sorry, awfully sorry.
23. You _D_ her in her office last Friday; shes been out of town for two weeks.
A neednt have seen B must have seen
C might have seen D cant have seen
24. That was so serious a matter that I had no choice but _D_ the police.
A called in B calling in C call in D to call in
have no choice but to do sth. 别无选择,只能做...
25. She was so _B_ in her job that she didnt hear anybody knocking at the door.
A attracted B absorbed C drawn D concentrated
be attracted by 被所吸引; be absorbed in 全神贯注于做
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