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A survey of health researchers ______ that four hours of exercise every week ____ good for our health.

A. show; are B. shows; is

C. show; is D. shows; are

B

【解析】

试题解析:考查主谓一致。第一空中注意主语为a survey,而不是researchers,第二空虽然主语four hours看起来为复数,但很明显主语强调的是每周锻炼四小时这件事对健康有好处,所以仍应把主语看成单数形式。句意:一份研究者健康调查显示每周四小时的锻炼有利于健康。故选B。

考点:考查主谓一致。

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