She’ll never forget her stay there she found her son who had gone missing two ye
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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
试题答案
D
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。