摘要： 本题较难.是一个非限制性定语从句.答案A.B是等同的.where常等于:in/at/from--- + which , 故两个答案都排除.from where = from by the window, 意思是:“从窗户旁边那个地方 .再如: The boy was hidden behind the door, from where he could see what was going on in the room.

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