____is known to everybody,the moon travels round the earth once every month. 这道题应选什么?A:as B:it(我刚刚A,B忘写了,不好意思啦)

问题描述:

____is known to everybody,the moon travels round the earth once every month. 这道题应选什么?
A:as B:it(我刚刚A,B忘写了,不好意思啦)

As
As作主语,替代后面的the moon travels round the earth once every month。

As

没有选项我也知道!填As

应该用 As

这边要用As
it is...that...

用As

AS

A,B都是什么啊?没写清楚啊