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________from space, the earth, with water_____seventy percent of its percentage, looks like a “blue ball.”
A.Seen; coveredB.Seeing; coveringC.Seeing; coveredD.Seen; covering
D

试题分析:考查非谓语动词:句意“从太空看,有70%的水覆盖它表面的地球就像一个蓝色的球。第一空 过去分词作条件状语 它和主语the earth的关系是被动关系,第二空是过去分词作状语。第二空是with的复合结构。Water和cover这里是主动关系,用现在分词做宾语补足语,选D。
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