问题补充：
I saw a woman running toward me in the dark. Before I could recognize who she was, she had run back in the direction she had come.
A. of which
B. from where
C. in which
D. from which
答案：
A. of which
B. from where
C. in which
(答案→)D. from which
解析：虽然是考查“介词+关系代词”引导的定语从句，但从四个选项来看，重点是区分用哪个介词。介词由从句中的谓语动词与先行词决定：come the direction；由语境可知，指她就是“从那个方向”来的，而不是“朝/向那个方向”来的，所以用from而不用in。又如What direction do tornado come from？(龙卷风从哪个方向袭来？)
