Do you still remember the days when we stayed together in Beijing last summer?

题目

Do you still remember the days when we stayed together in Beijing last summer?
when 为什么不能用in which替换?

答案

先把句子还原.We stay together in Beijing last summer.这里stay together之间并没有in.（in Beijing 不算,这in修饰地方的）但是我说Do you syill remember the school where we study together?这里还原就是we stu...