老师说 定语从句中地点状语in which =where I‘ll never forget the day on which I joined the club

题目

老师说 定语从句中地点状语in which =where I‘ll never forget the day on which I joined the club
老师说 定语从句中地点状语in which =where
I‘ll never forget the day on which I joined the club 中on which是不是这么得出来的呢：∵on the day ∴on which也就是说which前的介词以先行词前所需加的介词决定吗?这结论对吗 那么 这 里 的 on which 等于when
句子1 Don't forget the day when you were received into the Youth League中的when 是不是也能用on which代替呀?
句子2；Do you know the reason why she has changed her mind?这里why又等于什么了呢?选项C for that 选项D of which 如果是我想的那样的话我只知道the reason for...那么既然如此是不是只要把D改成for which 就行了?
还有有没有at the day啊.

答案

问题1是对的
问题2的句子一是对的.句子二why不能等于什么了吧.
后面的看不懂了,你想表达什么?
没有at the day,只有at that moment