问题补充:
28.She’ll never forget her stay there she found her son who had gone missing two years before.
A. that
B. which
C. where
D. when
答案:
A. that
B. which
C. where
(答案→)D. when
解析:考查定语从句的用法。her stay为先行词,可以理解为抽象的一段时间(她呆在那里期间),when指代her stay在定语从句中做时间状语。