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. shoe; is
D. shows; are
网友回答
A. show; are
(答案→)B. shows; is
C. shoe; is
D. shows; are
解析：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。