from space the earth with waterseventy percent of its percentage looks like a “blue bal

问题补充：

from space, the earth, with waterseventy percent of its percentage, looks like a “blue ball.”

A. Seen; covered

B. Seeing; covering

C. Seeing; covered

D. Seen; covering

答案：

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。