join,join in ,be in的区别与联系you can be in the music festival.I am in the music club.老师所这两个bein都是参加的意思,可是be In后是加活动还是组织呢

问题描述:

join,join in ,be in的区别与联系
you can be in the music festival.I am in the music club.老师所这两个bein都是参加的意思,可是be In后是加活动还是组织呢