问题
单项选择题
（）from the top of the tower, the south foot of the mountain is a sea of trees.
A. Seen
B. Seeing
C. Having seen
D. To see
答案
参考答案：A
解析：
本题考查分词作状语，排除C。the south foot of the mountain和句首的see 是动宾关系，所以see应该用被动语态，排除B和D。故选A。