Question

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

Answer 1

D

考查定语从句。Stay逗留，停留，，在这里做先行词，从句中缺少时间状语，故选D。句意：她将永远也忘不了两年前她在那找到她失踪儿子的逗留的日子。