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---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
A
考查非谓语动词。句意:从月球上看,我们的地球像什么?——嗯,我们的地球,有水覆盖在它70%的表面,像一个蓝色的球。过去分词表示被动的,发生过的动作,和句子主语是动宾关系。现在分词表示正在进行的伴随性的动作,和句子主语是主谓关系。结合句意可知上文为被动动作,下文为主动的伴随性动作,故选A。
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