from space the earth with water 70％ of its surface looks like a “blue blanket”.A. Seen; c

问题补充：

from space, the earth with water 70％ of its surface looks like a “blue blanket”.

A. Seen; covered

B. Being seen; covers

C. Seeing; covering

D. Seen; covering

答案：

A. Seen; covered

B. Being seen; covers

C. Seeing; covering

(答案→)D. Seen; covering

解析：考查非谓语动词的用法：第一空填seen是过去分词做状语，因为the earth和see是被动关系，第二空填covered做宾语补足语，这是with复合结构，water和cover之间是被动关系：句意是：从太空看，有水覆盖表面70%的地球看起来像个蓝色的毯子。选D。