问题
选择题
______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
答案
答案: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。