27. At first, the speaker was referring to the problem of pollution in the country, but halfway in her speech, she suddenly _B_ to another subject.
A committed B switched C favoured D transmitted
switch to another subject 转换话题; switch to another channel 转换频道。
28. It is politely requested by the hotel management that radios _C_ after 11 o'clock at night. [虚拟语气]
A were not played B not to play C not be played D did not play
29. Although I like the appearance of the house, what really made me decide to buy it was the beautiful _D_ through the window.
A vision B look C picture D view
view n. 景色，风景，视野，视域。
30. Cancer is second only _B_ heart disease as a cause of death.
A of B to C with D from
具有比较意味的形容词都要与介词to搭配。
32. The manager needs an assistant that he can _A_ to take care of problems in his absence. [in his absence 在某人不在场的情况下]
A count on B count in C count up D count out
presence n. 到场，出席; in one’s presence 在某人在场的情况下。
count on=depend on 指望，依靠，依赖; count up 算出总数;
count in 把…算在内; count out 把...排除在外。
33. The organization had broken no rules, but _A_ had it acted responsibly.
A neither B so C either D both
34. We gave out a cheer when the red roof of the cottage came _D_ view.
A from B in C before D into
come into view 进入视野，进入眼帘。 cheer n. 欢呼; cheers 干杯;
cheer-team 拉拉队; cheer-leader 拉拉队长。英语中为了…干杯用介词to引起。
to your health 为了你的健康干杯; to friendship为了友谊干杯。 bottom up 先干了。
35. They took _D_ measures to prevent poisonous gases from escaping.
A fruitful B beneficial C valid D effective
take effective measures 采取有效措施。 valid adj. 有效的，成立的。
36. Doing your homework is a sure way to improve your test scores, and this is especially true _A_ it comes to classroom tests.
A when B since C before D after
sure 做定语时表示“可靠的、稳妥的”。 come to 谈到，提及。
37. Careful surveys have indicated that as many as 50 percent of patients do not take drugs _D_ directed.
A like B so C which D as
drug n. 药品，毒品。 gay adj. 放荡的，快乐的; n. 同性恋者，尤指男性同性恋。
so后面加过去分词表示一种程度。 as后面加过去分词时表示“如同…那样，正如…那样”。
53. I hope all the precautions against air pollution, _D_ suggested by the local government, will be seriously considered here.
A while B since C after D as
precautions n. 防治措施; precautions against 防治…的措施。
after being + 过去分词，注意：after后面不能直接加过去分词。
38. In developing countries people are _C_ into overcrowded cities in great numbers.
A breaking B filling C pouring D hurrying
pour into 涌入，蜂拥而入。 break into 强行闯入。
39. It's reported that by the end of this month the output of cement in the factory _A_ by about 10%. [output 产量]
A will have risen B has risen C will be rising D has been rising
表达将来的行为在将来某时间之前完成用将来完成时。
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