from a plane the Great Wall looks like a huge dragon.A. SeeingB. SeenC. To seeD. Look ou

问题补充：

from a plane, the Great Wall looks like a huge dragon.

A. Seeing

B. Seen

C. To see

D. Look out

答案：

A. Seeing

(答案→)B. Seen

C. To see

D. Look out

解析：seen from a plane 是过去分词短语作状语, seen的逻辑主语是the Great Wall.