答案:A 不定式的用法。送样品是将来要发生的动作,所以应该用不定式;但是样品和送之间是被动关系;综合两个知识点应选A。
18. The forest fire caused by the volcano is difficult to be_____.
A. put off B. put away
C. put out D. put up
答案:C 短语辨析。根据题干大火应该是被扑灭的,应选C,put out 扑灭,出版。
19. It was not_____ midnight that they discovered the children were not in their beds.
A. before B. at C. after D. until
答案:D 固定搭配。It is…that 是一个强调句,可以看出本句强调的是时间。A、B、C、D项都可以和midnight 进行搭配,但能和not 连用表示强调的只有D项,只有….才….。
20. The girl is not happy at the new school. She has _____ friends there.
A. few B. a few C. little D. quite a few
答案:A 词义辨析。A项是几乎没有的意思,而且few还是修饰可数名词的,其它项都不符合题意,所以应选A。
21. Robots have already_____ human tasks in the industrial field.
A. taken on B. taken out C. taken up D. taken over
答案:A 词义辨析。take on 承担,从事。take out 拿出,带出。take up 开始从事,占据。take over接管,接收。根据句意应选A项。
22. I can’t find the recorder in the room. It ____ by somebody.
A. must have taken B. may have taken
C. may have been taken D. should have been taken
答案:C 情态动词的推测。首先根据by可以看出应该选的是被动式,首先可排除A和B项,而C项的may 是对现在或过去不太肯定的推测,D项should表示据事实而论,所以根据句意应选C项。
23. He took the medicine, but it didn’t have any_____.
A. answer B. cause C. effect D. effect
答案:C 词义辨析。Answer 答案。Cause 原因。Effect 作用,影响。Effect 工作。据句意应选C。
24. It is_____ that over one million Americans now live below the poverty line.
A. judged B. estimated C. calculated D. considered
答案:B 词义辨析。Judged 审理,断定。Estimated 粗略的计算或由不完全资料计算的;估计,预算,常用It is estimated…这样的句型。Calculated 计算。Considered 考虑。根据句意应选B。