一道语法题:( )from the moon,the earth looks like a colorful ball.
问题描述：
一道语法题:( )from the moon,the earth looks like a colorful ball.
( )from the moon,the earth looks like a colorful ball.
A.Seeing
B.Having been seen
C.Having seen
D.Seen
答
D 考察非谓语 地球被看 seen