She'll never forget her stay there __________she found her son who had gone missing two years before.

2023-08-08

A.that
B.which
C.where
D.when


参考答案:D

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。

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