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It’s necessary to be prepared for a job interview.________ the answers ready will be of great help.

[  ]
A.

To have had

B.

Having had

C.

Have

D.

Having

答案:D
解析:

动词原形不可作句子主语;动词不定式作句子主语时表示一次性的或将要发生的动作;动名词作主语表示习惯性或经常性的动作。由题意可知,空格上所填单词或短语要和the answer ready组成句子的主语,而动词原形不可作主语,故排除C项;A项和B项表示一次性的已经发生的动作,与题意不符,故被排除;动名词作主语可以表示一般经常性的行为,故选D项。


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