___ most of the earth’s surface is covered by water, fresh water is very rare an
___mostoftheearth’ssurfaceiscoveredbywater,freshwaterisveryrareandprecious.A.AsB.Once...
___ most of the earth’s surface is covered by water, fresh water is very rare and precious.
A. As
B. Once
C. If
D. Although 展开
A. As
B. Once
C. If
D. Although 展开
1个回答
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