It is necessary that anyone ______exercises every day if he wishes to keep healthy. A

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It is necessary that anyone ______exercises every day if he wishes to keep healthy.

A. do

B. would do

C. did

D. will do

参考答案:

A17.答案为A 参考译文;某人如若希望保持健康,他必须每天锻炼身体。本题是虚拟语气。在“his necessary that...”后边,主语从句中谓语动词一般由“should+动词原形”构成。注:在表示建议、命令、要求以及重要性和紧迫性等含义的名词从句中,谓语动词都要用虚拟语气;谓语动词一律是由“should+动词原形”构成,但在现代英语中,should通常可以省略。