题干

A survey of the opinions of experts _________ that three hours of outdoor exercise a week ________ good for one’s health.
A.show; areB.shows; is
C.show; isD.shows; are
上一题 下一题 0.65难度 单项选择 更新时间:2014-07-10 04:33:33

答案(点此获取答案解析)