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