Question

【题目】___________ is known to everyone, the moon travels round the earth once every month.

A. It B. As

C. That D. What

Answer 1

【答案】B

【解析】

试题考查定语从句。As指代后面一句话的内容，引导非限制性定语从句，在本句总做主语。句意：正如每个人都知道的那样，月球一个月绕着地球一圈。故B正确。