问题
选择题
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
答案：D
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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
答案：D