If we don＇t stop the population from increasing at such a rapid rate, there will ________ not be enough room left on the earth for human to stand, let alone development.

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Only when we had finished all the work ___________that it was too late to take a bus home.

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_________ a wonderful trip he had when he traveled in China!

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大学英语A语法词汇

The teacher doesn＇t permit ___________ in class.

A、smoke

B、smokes

C、to have a smoke

D、smoking

答案：D

解析：参考解析: permit的动宾结构有两种: permit doing sth.和permit sb.to do sth.。在此处为第一种，故选D。

相关题目

Fresh fruits and vegetables are generally less expensive when they are in _______.

A. need

B. season

C. time

D. sale

解析：in need在困难中、需要帮助/ in season应时的/ in time及时，适时地

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I _________ you had returned the book yesterday.

A. want

B. would rather

C. liked

D. had better

解析：参考解析:在动词would rather后面的宾语从句中，对过去情况的假设，谓语动词用had+动词过去分词, 故应选B。类似用法还有had rather，would sooner，would just as soon等。

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__________ tired of Tom＇s all-talk-no-action attitude, Julia decided to do the job all by herself.

A. To get

B. To have got

C. Getting

D. Have got

解析：参考解析:本题考查对分词短语用法的掌握。由Getting引导的分词短语在句中做状语，表示原因。

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Helen Keller lost both her sight and hearing after a severe illness ________.

A. of her age in 19 months old

B. when she was 19 months old

C. when 19 months old she was

D. she was 19 months old

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They will not start the project until the board chairman _______ back from South Africa.

A. will come

B. is coming

C. came

D. comes

解析：参考解析:句式结构。not until经常连用，意思是"直到......"。使用not until时要注意前后句子的时态，until表示的是一个时间点，主句用的是一般将来时，从句要用现在时，选D。A项、B项和C项在时态上均不符本题意思。句意:等董事会主席从南非回来，他们才会运作这个项目。

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Everyone has periods in their lives __________ everything seems so hard.

A. when

B. where

C. which

D. that

解析：参考解析:译文:每个人的生命里都有一段什么事情都看似十分艰难的时期。考点:定语从句。解析:本题的关系词引导定语从句修饰periods，指的是一段时期，并在从句中作时间状语，因此选A。

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He ______ his arms in front of him as if he were praying to God.

A. extended

B. included

C. excluded

D. intended

解析：ed形容词后缀
extended延伸的
included包括在内的
excluded排除在外的
intended刻意的

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If we don＇t stop the population from increasing at such a rapid rate, there will ________ not be enough room left on the earth for human to stand, let alone development.

A. mainly

B. eventually

C. lately

D. constantly

解析：mainly部分地; 主要地; 基本上;
eventually终于，最后; 竟; 总归; 终究;
lately近来，最近; 不久以前;
constantly 不断地，时常地; 始终; 一直;

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Only when we had finished all the work ___________that it was too late to take a bus home.

A. did we realize

B. will we realize

C. we did realize

D. we will realize

解析：参考解析:倒装句。当only放在句首时，主句就需要部分倒装。部分倒装一般要依靠助动词来完成。助动词的选择要符合具体的时态和人称，而原句中的实意动词则转化为其原形。本题所讲述的事情发生在过去，所以用过去时，选A。干扰项B时态不对，本题的事情并非发生在将来，C和D是主动语态，均不正确。句意:等我们完成了所有工作之后才发现时间太晚了，我们赶不上回家的班车了。

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_________ a wonderful trip he had when he traveled in China!

A. Where

B. How

C. What

D. That

解析：参考解析:本题考查感叹句。当感叹句后面接的是不定冠词+形容词+名词，且这个名词是可数名词时，前面要用what来引导这个感叹句。根据句意，正确答案为C。句意:他在中国的旅行是多么美妙呵!

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