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It is becoming increasingly difficult to grow enough food to ________ much of the earth's population from starvation.

A、prevent

B、defend

C、guard

D、preserve

答案:A

解析:prevent预防
defend辩护; 保卫;
guard保卫; 守护
preserve保护

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大学英语A语法词汇
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Not until the day before yesterday _______ to give a speech at the meeting.
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When we arrived at the station, it was said that the train would be late for ten minutes, so we_______.
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I advise that she _______ another day.
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Only after I had reached the airport ________ that I had forgotten to take my ticket with me.
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Never _______ such a good boss before I came to this company.
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—I cannot find Tom anywhere. —He _______ have been off long. I heard him make a call just now.
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He is used to flying by air and on no occasion _______ frightened.
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This new style of sports shoes is very popular and it is ____ in all sizes.
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The heart is an important organ of circulation _________ function is to pump blood to all parts of the body.
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l ________ my former manager when I was on a flight to Beijing.
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大学英语A语法词汇
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大学英语A语法词汇

It is becoming increasingly difficult to grow enough food to ________ much of the earth's population from starvation.

A、prevent

B、defend

C、guard

D、preserve

答案:A

解析:prevent预防
defend辩护; 保卫;
guard保卫; 守护
preserve保护

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大学英语A语法词汇
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Not until the day before yesterday _______ to give a speech at the meeting.

A. he agreed

B. does he agree

C. he agrees

D. did he agree

解析:参考解析:倒装语序、过去时态。前面使用的否定not until,后面部分应该采用倒装,又因为这里的时间是the day before yesterday(前天),时态为过去时态。这个句子的正常语序应该是He did not agree to give a speech at the meeting until the day before yesterday故D为正确答案。句意:直到前天,他才答应在会上做发言。

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When we arrived at the station, it was said that the train would be late for ten minutes, so we_______.

A. needed not to hurry

B. needn't have hurried

C. didn't need hurry

D. hadn't needed to hurry

解析:参考解析: needn't+完成时,表示本来不需要做,但是做了之意,故选B。

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I advise that she _______ another day.

A. comes

B. came

C. should come

D. will come

解析:考点:虚拟语气 题意:我建议她改天再来
答案:should come(should可以省略)
解释:表示建议、强迫、命令的动词,后接宾语从句需要用should do something的虚拟形式

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Only after I had reached the airport ________ that I had forgotten to take my ticket with me.

A. I realized

B. have I realized

C. did I realize

D. I had realized

解析:参考解析:Only+状语置于句首时,主句使用部分倒装结构,即将谓语部分的助动词置于主语之前。由从句中的过去完成时推知主句中应是─般过去时,故选C。

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Never _______ such a good boss before I came to this company.

A. do I meet

B. had I met

C. I met

D. I had met

解析:参考解析:句意: 在我来这个公司之前,从未遇到过这么好的老板。考查倒装结构。当表示否定意义的副词置于句首时应使用倒装结构,该句中before表明动作发生在过去的过去。应使用过去完成时,正确答案为B。

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—I cannot find Tom anywhere. —He _______ have been off long. I heard him make a call just now.

A. shouldn't

B. can't

C. mustn't

D. needn't

解析:参考解析:语境表示语气很肯定的否定判断推测:我刚才还听见他打电话了,因此他一定没走多远。用can't have done。shouldn't have done表示本不应该做某事;mustn't have done表示禁止做某事;而needn't have done指的是本来没必要做某事。

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He is used to flying by air and on no occasion _______ frightened.

A. he ever felt

B. he has ever feels

C. ever does he feel

D. has he ever felt

解析:参考解析: 本题考查对倒装句的掌握。由于句中有否定词no,所以on no occasion 决不 后的句子要用倒装句式。

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This new style of sports shoes is very popular and it is ____ in all sizes.

A. important

B. active

C. available

D. famous

解析:参考解析:本题考查形容词词义辨析。important的意思是"重要的、首要的",active的意思是"积极的、活泼的",available的意思是"可获取的、可购得的,有空的",famous的意思是"出名的、有名的”。根据句意,正确答案为C。句意:这种新型的运动鞋很受欢迎,各种尺码都有货。

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The heart is an important organ of circulation _________ function is to pump blood to all parts of the body.

A. which

B. whose

C. of it

D. its

解析:参考解析:选项A的which应该在定语从句中担任一定的成分,但空格之后的句子是主系表结构,主谓成分已经很齐全,所以不适合; 选项C不能使原句的结构成立; 而假如把its放在空格处,在其前应该加句号将两句分开,故D也不合适;选项B的whose作关系代词时,既可指人,也可指物,符合题意,故选B。

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l ________ my former manager when I was on a flight to Beijing.

A. ran into

B. took away

C. put on

D. shut down

解析:参考解析:本题考查动词词组。run into的意思是"偶遇、碰见",take away的意思是"取走、带走”,put on的意思是"穿上、上车",shut down的意思"关押、关闭、罢工"。根据句意,正确答案为A。句意:在去北京的飞机上,我偶然遇到了我的前任经理。

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