is known to everyone, the moon travels around the earth once every month. A．It B
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________ is known to everyone, the moon travels around the earth once every month.
A．It B．As C．That D．What
试题答案
B
解析:
略
________ is known to everyone, the moon travels around the earth once every month.
A．It B．As C．That D．What
B
解析:
略