It's no longer a question now man can land on the moon.A. whenB. thatC. whetherD. how

发布时间:2020-08-16 22:21:00

It's no longer a question now      man can land on the moon.
A. when
B. that
C. whether
D. how

网友回答

A. when
(答案→)B. that
C. whether
D. how
解析:考查主语从句。本题的it是形式主语,真正的主语是that man can land on the moon,that引导起这个主语从句,在句中起连接作用,没有任何实际意义。
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