40. If I had remembered _A_ the window, the thief would not have got in.
A to close B closing C to have closed D having closed
remember to do sth. 记得要做某事但没做。
41. There are other problems which I don't propose to _A_ at the moment.
A go into B go around C go for D go up
at the moment 目前，现在。 go into 谈论，讨论。
42. Don't get your schedule _C_; stay with us in this class.
A to change B changing C changed D change
43. It is quite necessary for a qualified teacher to have good manners and _A_ knowledge.
A extensive B expansive C intensive D expensive
extensive adj. 范围广大的，广博的; extensive knowledge 知识渊博。
expansive adj. 扩张的，面积广阔的; expensive adj. 昂贵的，高价的。
intensive adj. 仔细深入的，细致入微的。
54. The patient's health failed to such an extent that he was put into _C_ care.
A tense B rigid C intensive D tight
to such an extent 到如此的程度。 intensive care 特级护理。
44. Jean doesn't want to work right away because she thinks that if she _B_ a job she probably wouldn't be able to see her friends very often.
A has to get B were to get C had got D could have got
46. A love marriage, however, does not necessarily _B_ much sharing of interests and responsibilities. [a love marriage因相爱而结婚形成的婚姻]
A take over B result in C hold on D keep to
not necessarily 未必; interests n. 利益。 take over 接管，接收;
result in 导致，结果是; hold on 坚持，挺住; keep to 坚持，遵守。
47. The ability to store knowledge makes computers different form every other machine _A_ invented. [ever adj. 曾经，以往任何时候]
A ever B thus C yet D as
48. I'm not sure whether I can gain any profit from the investment, so I can't make a(n) _C_ promise to help you.
A exact B defined C definite D sure
definite: unlikely to be changed 不可能被改变的; definite promise 不可能被改变的诺言。
49. I have kept that portrait _B_ I can see it every day, as it always reminds me of my university days in London.
A which B where C whether D when
which在定语从句中除了做主语就是做宾语，when在定语从句中只能做时间状语。
remind sb. of sth. 使某人想起某事。
50. The sports meet, originally due to be held last Friday, was finally _D_ because of the bad weather. [sports meet=sports meeting 运动会]
A set off B broken off C worn off D called off
21. Until then, his family _D_ from him for six months.
A didn't hear B hasn't been hearing C hasn't heard D hadn't heard
until then 直到那时。 hear from sb. 收到某人的来信，得到某人的消息。
22. The conference _B_ a full week by the time it ends.
A must have lasted B will have lasted C would last D has lasted
见到介词by引导的时间状语，谓语动词就应是完成时态。
24. Physics is _B_ to the science which was called natural philosophy in history.
A alike B equivalent C likely D uniform
be alike to sb. 对于某人来说均是一样的。 be equivalent to 相当于。
All tastes are alike to him. 所有味道对他来说都一样。
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