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A survey of the opinions of experts___that three hours of outdoor exercise a week___good for one’s health.

A.show;are

B.shows;is

C.show;is

D.shows;are

 

【答案】

B

【解析】主语A survey of the opinions of experts表示单数,所以要用shows。three hours of outdoor exercise a week表示时间,所以也表示单数,要用is。

 

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