she will never forget her stay there( )she found her son who had gone missing two years before.

问题描述:

she will never forget her stay there( )she found her son who had gone missing two years before.
2009四川考题
括号
里为什么选when?答案是when
为什么不能是where引导定语从句呢?there是先行词

when是引导时间状语从句,从句意可以知道需要的是一个时间而不是地点,there后的句子并不是来修饰there这个词的.