______thattheearthisround.A.asisknowntoallB.asyouseeC.ItisknowntoallD.asisseen
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题目内容：
______ that the earth is round.
A.as is knownto all
B.as you see
C.It is known to all
D.as is seen
优质解答
C
it's.that句型
it做形式主语
A,as is knownto all 后要用逗号搁开
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