We’ll never forget the days we lived in the country.A. whenB. whereC. whichD. 不填

问题补充：

We’ll never forget the days we lived in the country.

A. when

B. where

C. which

D. 不填

答案：

(答案→)A. when

B. where

C. which

D. 不填

解析：句意：我们永远不会忘记我们住在乡下的日子。先行词the days后面接的是定语从句，故排除B。定语从句中不缺少主语，宾语和表语，故排除CD。when在定语从句中做时间状语。故选A。