摘要： is known to everybody, the moon travels round the earth. is known to everybody that the moon travels round the earth.
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_______ is known to everybody that the moon travels round the earth once every month.
A. It B. As C. That D. What
查看习题详情和答案>>_____ is known to everybody that the moon travels round the earth.
A．It B．As C．When D．Where
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