is known to us all, the earth is round.That is to sayis known to us all is that the earth

发布时间：2020-08-16 10:25:49

    is known to us all, the earth is round.
That is to say    is known to us all is that the earth is round .
A. As, what
B. As, as
C. what ,as
D. What ,what

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(答案→)A. As, what
B. As, as
C. what ,as
D. What ,what
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