单选题
1分
She'll never forget her stay there __________she found her son who had gone missing two years before...
She'll never forget her stay there __________she found her son who had gone missing two years before.
参考答案: D
参考解析: 考查定语从句。her stay为先行词,可以理解为抽象的一段时间(她待在那里期间),when指代her stay在定语从句中作时间状语。