-I joined the League ___May,2009.What about you?-I've been a League member__in three years.A.in;for B.on:in C.on;for D.in;since请说明理由

I shall never forget the day in which I joined the league是上句对还是I shall never forget the day on which I joined the league对? -I joined the League ___May,2009.What about you?-I've been a League member__in three years. I'll never forget the days ___ I joined the League(填介词) I’ll never forget the days _______ I joined the League. I'll never forget the days_____I joined the League.为什么填when 而不用that I will never forgert the day_____I joined the League.为什麽填when而不填that,这是什麽从句? i will never fogret the day __i joined the league是填when吗?在线等的 帮帮忙了谢谢 I ( ) the league for five years A joined B.have joined C.have been in D.join((要解释）） Elias trusted Mandela and he joined the ANC Youth League. He ( ) for three years.A.has joined the Youth League B.had joined the Youth LeagueC.has been a League member D.had been a league member I will never forget the day ____ I joined the League.A.which B.on that C.when D.in which 定语从句中 on which ,at which,in which 怎么 用i'll never forget the day____I joined the league要 .分别什么情况下用 -I joined the League ___May,2009.What about you?-I've been a League member__in three years.A.in;for B.on:in C.on;for D.in;since请说明理由 请问下面这个宾语从句语法对吗?just作如何解释,I told my mother two more students in our class had just joined the league. It was in 1988,when I was studying in a middle school,__I joined the league.A.where B.when C.in which D.that He joined the League in 2004.变同义句He ___ ____ ______ ___ the League in 2004. t is three years since he joined the League?it is three years since he has joined the League?那个正确?为什么呢? When he o______the ANC Youth League.I joined it as soon as I could.