◎ 题干
---What is our earth like ________from the moon?
---Well, our earth, with water ________ 70% of its surface, appears as a "blue ball".
A.seen; coveringB.seen; to cover
C.seeing; coveredD.seeing; covering
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“ ---What is our earth like ________from the moon? ---Well, our earth, with water ________ 70% of its surface, appears as a "blue ball". A.seen; coveringB.se…”主要考查了你对  【现在分词的被动式】【现在分词】【不定式的被动式】【过去分词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。