__________ is even more important is _________ the earth cooled down, water began to appear on its surface.
A.What; that as | B.It; which |
C.It; which as | D.What; which |
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__________ is even more important is _________ the earth cooled down, water began to appear on its surface.
A.What; that as | B.It; which |
C.It; which as | D.What; which |