题目内容：

She will never forget her stay there____she found her son who had gone missing two years before.
Athat Bwhich Cwhere Dwhen

优质解答

选D.
由forget her stay ,her为形容词,后接名词,故her stay为名词词组,stay作名词时意为一段时间.
且后面的从句是一条完整的句子,所以所欠的只有状语.那么,只剩时间状语when和地点状语where,又由stay的意思知选D.