is even more important is the earth cooled down, water began to appear on its surface.
A.When; that; when | B.What; whether; as | C.What; that; as | D.lt; whether; as |
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is even more important is the earth cooled down, water began to appear on its surface.
A.When; that; when | B.What; whether; as | C.What; that; as | D.lt; whether; as |