◎ 题干
From the space, the astronaut can see more than 70 percent of the earth _____ by water.
[     ]
A. are covered
B. is covered
C. covering
D. cover
◎ 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“From the space, the astronaut can see more than 70 percent of the earth _____ by water. [ ]A. are covered B. is covered C. covering D. cover …”主要考查了你对  【被动语态】【主谓一致】  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。