______from space, our earth, with water covering 70% of its surface, appears as a "blue planet".

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问题 ______from space, our earth, with water covering 70% of its surface, appears as a "blue planet".

选项 A、Seeing
B、Be seen
C、Seen
D、Being seen

答案C

解析 本题考查非谓语动词的用法。过去分词短语作状语,表示时间或条件,等同于when/if(itis)seen from space;“our earth”是动作“see”的受动者,所以选项C)为正确答案。句意为“从太空中看,我们的地球,它的表面70%的地区覆盖着水,就像一个蓝色星球”。
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