__from the moon,the earth with water___70%of its surface.

问题描述:

__from the moon,the earth with water___70%of its surface.
为什么两个空是Seen和covering,而不是seeing和covered?

see这个动词的主语是the earth,地球是被看的,所以用被动.后面的covering是 占 的意思,是with的伴随动词.