_____ from the top of the tower ,the south foot of the mountain is a sea of trees .

题目：_____ from the top of the tower ,the south foot of the mountain is a sea of trees .

A.Seen
B.Seeing
C.Have seen
D. To see

喵查答案：A

 考查非谓语动词。此处是非谓语动词做状语，逻辑主语是句子的主语，非谓语动词与逻辑主语是被动关系，且其动作在谓语动词动作之前已经完成，用过去分词，选A。