摘要： is known to us all is that the earth is smaller than the sun. A. What B. As C. Which D. It
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_________ is known to us all is that the earth is smaller than the sun.
A. It B. What C. As D. which
查看习题详情和答案>>_________ is known to us all is that the earth is smaller than the sun.
A. It B. What C. As D. which
查看习题详情和答案>>___ is known to us all is that the earth is smaller than the sun.
A. What B. As C. Which D. It