题目内容

A survey of the opinions of experts ______ that three hours of outdoor exercise a week _____ good for one’s health.
A.show; areB.shows; isC.shoe; isD.shows; are
B
考查主谓一致。A survey是主语,所以第一空用shows; that引导的宾从exercise是主语,所以用is 。选B。
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