Question

______from space, the earth, with water _____seventy percent of its surface looks like a blue ball.

A．Seen; covered

B．Seen; covering

C．Seeing; covered

D．Seeing; covering

Answer 1

B

这题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covering是with复合结构，因为water和cover 是主动关系。选B。