问题
选择题
________ from the top of the tower, the south foot of the mountain is a sea of trees.(2010·陕西)
A．Seen
B．Seeing
C．Having seen
D．To see
答案
答案：A
A [考查非谓语动词。此处是非谓语动词作状语，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，用过去分词。]
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