The date when I joined the club was the 5th of August.这里的关系副词when可以改成 on which么

I will never forget the day when I join the Party,join为什么不用过去式? i want to join the When __ his father___(join)the Party. 这句话明白一点译法是什么?i mean when i confirm the date am coming to meet you. The date when I joined the club was the 5th of August.这里的关系副词when可以改成 on which么 这句话 in which 还是 when 好?I would like to join the PhD program, when/in which I wish to participate in your research projects. I want to sports the join club I want to join the art club I want to join the music club . i want to join the art club i want to join the music club I want to join the basketball club. i have forgotten the date（ ） i meet her first timea,when b,where说个理由赛，掉了一个THE i (would like to join) the basketball club.A.like to join B.want to join C.join You never know when the date of your death is. When is it 和 What's the date 的区别? When did your brother join the team?_______..... join 和join in区别?He __ the club when he was studying in the city of NY为什么是join 而不是join in?