from space, the earth, with water seventy percent of its percentage, looks like a “blue ball.”
A. Seen; covered
B. Seeing; covering
C. Seeing; covered
D. Seen; covering
网友回答
A. Seen; covered
B. Seeing; covering
C. Seeing; covered
(答案→)D. Seen; covering
解析：考查非谓语动词：句意“从太空看，有70%的水覆盖它表面的地球就像一个蓝色的球。第一空 过去分词作条件状语 它和主语the earth的关系是被动关系，第二空是过去分词作状语。第二空是with的复合结构。Water和cover这里是主动关系，用现在分词做宾语补足语，选D。