单选题 Seen from space, our earth, with water covering 70% of its surface, appears as a “blue planet”.
【正确答案】 B
【答案解析】seen from space过去分词短语做状语，“从太空中看(地球)”；with water covering 70% of its surface介词短语做状语，“(地球)表面的70%都被水覆盖着”