from space the earth with water 70％ of its surface looks like a blue blanket. A. Seen ;c

问题补充：

from space, the earth with water 70％ of its surface looks like a blue blanket.

A. Seen ;covered

B. Being seen; covers

C. Seeing; covering

D. Seen; covering

答案：

A. Seen ;covered

B. Being seen; covers

C. Seeing; covering

(答案→)D. Seen; covering

解析：本题考查分词短语作宾语补足语和状语。在with复合结构中，宾语补足语covering

70% of its surface和宾语water构成主动关系，故应使用现在分词。seen from space 在句中作状语，和主语the earth构成被动关系，故使用过去分词。