is known to everybody that the moon travels round the earth.A. ItB. AsC. WhenD. Where

发布时间：2020-08-17 04:16:06

     is known to everybody that the moon travels round the earth.
A. It
B. As
C. When
D. Where

网友回答

(答案→)A. It
B. As
C. When
D. Where
解析：考察it作为形式主语。本句中的It是形式主语，真正的主语是后面的that the moon travels round the earth。这里的that只是一个引导词而已，不在句中充当任何成分。句意：众所周知的事情是月球绕着地球转。故A正确。
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