问题补充:
He’ll never forget his stay in the park he found his cellphone which had gone missing days before.
A. that
B. when
C. where
D. which
答案:
A. that
(答案→)B. when
C. where
D. which
解析:考查定语从句:句意:他永远忘不了在公园逗留的期间,那时他发现了几天前丢失的手机。先行词是his stay,表示时间,定语从句中缺少时间状语,选B。