2020年大学英语四级词汇与语法练习题八
来源 :中华考试网 2020-03-09
中1. Harry is feeling uncomfortable.He _____ too much at he party last night.
A could drink B should drink
C would have drunk D must have drunk
【答案】D
解析:must have done表示对过去肯定推测,句意“他昨晚在派对上一定喝多了”。
2. If he had spent more time practising speaking English before, he _____ able to speak it much better now.
A. will be B. would be
C.has been D.would have been
【答案】B
解析:If从句中的had spend暗示从句是跟过去事实相反的,而主句中的now暗示主句跟现在事实相反,故用would do句意:如果他从前花店时间练习英语口语,他现在就能说得好多了。
3. I can't find my purse. I ____ it in the supermarket yesterday, but I'm not sure.
A. should leave B. must have left
C. might leave D. could have left
【答案】D
解析:句意:我不能找到我的钱包了,昨天我有可能把它落到超市了,但我不确定。根据句中时间状语从句yesterday 可知,是对过去事情的推测,故用情态动词+have done, 再根据后句but I'm not sure. 可知,此推测为不能肯定的推测,故用情态动词could, 表示"可能"。故选D。
本题抓住两点:第一、时态。根据句中时间状语可以判断出是对过去事情的推测,故用情态动词 + have done;如果是对现在事情的推测,才用情态动词+v原形。
第二、情态动词的选择。must为肯定推测,表示“一定”,could为不肯定推测,表示“可能”,这样就能选出正确答案。
4. It's strange that he _____ have taken the books without the owner's permission.
A. would B. should
C. could D. might
【答案】B
解析:句意:真奇怪,他竟然没有主人的允许就拿走了这些书,在句型"It is important / necessary / strange / impossible / natural that...",其中由that 引导的主语从句通常用“should+动词原形”这样的虚拟语气,其中的should 可以省略。故选B。
It is important / necessary / strange / impossible / natural that... 主语从句多数情况下用虚拟语气,表达一种要求、命令或者责备、建议或主观看法。但是如果只是表示陈述一个事实而不是强烈的感情,完全可以用一般的陈述语气。
试比较: It is strange that he had made a mistake.(陈述一个事实:他犯了错误让人有点奇怪。) It is strange that he (should) have made a mistake. (虚拟语气,说话者是在责备他本不应该犯错。)
5. There is a good social life in the village, and I wish I _____ a second chance to become more involved.
A. had B. will have
C. would have had D. have had
【答案】A
解析:句意:在这个村里有很好的社交生活,并且我希望我再有机会去更多的参与。本题考查wish引导的宾语从句,表示与现在事实相反的愿望,所以从句用一般过去时。故选A。
由wish引起的表示愿望的虚拟语气:
1.用wish表示对现在的愿望时,它所引起的宾语从句中谓语动词形式为:过去式(be动词用were)。
2.用wish表示对将来的愿望时,它所引起的宾语从句中谓语动词形式为:would, could, might+ 动词原形。
3.wish用于对过去的事实表示一种不可能实现的愿望时,宾语从句中的谓语动词形式为:had+动词过去分词或could, would + have +动词过去分词。分析此题需抓住前句There is a good social life in the village的时态是一般现在时,可以判断出此题wish用于对现在的事实表示一种不可能实现的愿望。
6. In today's information age, the loss of data _____ cause serious problems for a company.
A. need B. should
C. can D. must
【答案】C
解析:句意:在今天的信息时代,数据的丢失有时会对一个公司造成严重的问题。数据丢失造成严重问题是客观上会发生的情况,即“客观可能性”,故该空应用情态动词can。C选项正确。其余情态动词均没有该用法。need需要;should应该,竟然;must必须,肯定。
can的基本用法:1. (表示能力、功能)能,会;2. (表示推测)可能,可能会;3.(表示允许,请求)可以;4.(表示客观可能性)有时会。
7. They might have found a better hotel if they _____ a few more kilometers.
A. drove B. would drive
C. were to drive D. had driven
【答案】D
解析:句意:如果他们多开几公里的话,他们也许会找到一个更好的旅馆。由“they might have found a better hotel”可知,该句是表示对过去的虚拟。if ____ a few more kilometers是条件句部分,表示对过去的虚拟,条件句部分要用过去完成时态,故D选项正确。
1. 表示对现在的虚拟:if条件句用一般过去时,主句用 would / might / could / should+do;
2. 表示对过去的虚拟:if条件句用过去完成时,主句用would / might / could / should+have done;
3. 表示对将来的虚拟:if条件句用were to do / should do / 一般过去时,主句用would / might / could / should+do。
8. If we ___________the flight yesterday, we would be enjoying our holiday on the beach
A. had caught B. caught
C. have caught D. would catch
【答案】A
解析:句意:如果我们昨天赶上飞机的话,现在我们正在海滩享受我们的假日了。根据时间状语yesterday可知,从句表示与过去事实相反,故用had + v-ed。故选A。
9. It ____ be the vocabulary that caused you the problem in the exercise because you know a lot of words.
A.may B.couldn't
C.should D.needn't
【答案】B
解析:由语境“因为你知道很多词汇”可知,“你练习中的问题不可能是词汇量不够造成的”,故用couldn’t表示否定推测,意思是“不可能”。
10. I ____ to my cousin's birthday party last night, but I was not available.
A.went B.had gone
C.would go D.would have gone
【答案】D
解析:前一分句使用了含蓄条件虚拟语气,表示与过去事实相反的假设,主句应该用would have done结构。完整表达是:I would have gone to my cousin's birthday party last night if I had been available。
此题可以根据but I was not available.这个事实,判断前面的句子是与事实不符的,用虚拟语气。
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