I think I have ______my speaking skills since I joined the c

I think I have ______my speaking skills since I joined the c I (work )__in the Human Resources Department since I joined I ( ) the league for five years A joined B.have joined C.hav I ______this group since then.A.have joined in B.have joined 1.It is two years ＿I joined the army.A.before B.since C.that ____ four years since I joined the Army. It is three years since I joined the army.改成完成时态 I ____four years since I joined the army.A.There was B.There i I've made a lot of friends since I joined the tennis club. I think -------- English is difficult.A.speaking B.speaks c. I have joined the school football team 改为同义句, I have joined in the dance club這句話對嗎?如题