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

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_____ 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

参考答案:

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。