How can i forget the days ( ) we spend together in that poor mountainous area

题目

How can i forget the days ( ) we spend together in that poor mountainous area
How can i forget the days ( ) we spend together in that poor mountainous area
A.when B.on which C.that D.what
为什么选that 不选 when
最好有详细的解析

答案

如果选择when,表示这两个动作同时发生
很明显,根据句子的意思,可以知道在poor mountainous area度过这个动作是之前发生的
而选择that的原因,是因为that连接之后的定语从句,表示“……的日子”