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. 記得要做某事但沒做。

　　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，現(xiàn)在。 go into 談?wù)摚�討論�?/P>

　　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. 范圍廣大的，廣博的; extensive knowledge 知識淵博。

　　expansive adj. 擴(kuò)張的，面積廣闊的; expensive adj. 昂貴的，高價的。

　　intensive adj. 仔細(xì)深入的，細(xì)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 特級護(hù)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因相愛而結(jié)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 導(dǎo)致，結(jié)果是; hold on 堅持，挺住; keep to 堅持，遵守。

　　47. The ability to store knowledge makes computers different form every other machine _A_ invented. [ever adj. 曾經(jīng)，以往任何時候]

　　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 不可能被改變的; definite promise 不可能被改變的諾言。

　　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在定語從句中除了做主語就是做賓語，when在定語從句中只能做時間狀語。

　　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 運(yùn)動會]

　　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 直到那時。 hear from sb. 收到某人的來信，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

　　見到介詞by引導(dǎo)的時間狀語，謂語動詞就應(yīng)是完成時態(tài)。

　　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. 對于某人來說均是一樣的。 be equivalent to 相當(dāng)于。

　　All tastes are alike to him. 所有味道對他來說都一樣。