问题
选择题
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
答案
答案：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。