Question

He’ll never forget his stay in the park ________ he found his cellphone which had gone missing days before.

1. A.
   that
2. B.
   when
3. C.
   where
4. D.
   which

Answer 1

B
试题分析：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。
考点：考查定语从句