问题
选择题
The captain stood by the window, _____ he could see the top of the tower.
A．where
B．from which
C．from where
D．which
答案
答案：C
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.