When did you become a pioneer?

When did you become a pioneer? How old__(be)you when you__(become)a Young Pioneer? When did you become a housewife? when did you become a pupil?怎样回答? When did California become a state? -When did you become a teacher?-In 1999.I___in this school s 英语翻译A:When did it become clear to you that the company presi since when did you two become such good friends? since when did/do you become so diligent When did Hawail become a state in the USA? did,she,a,when,champion,become,swimming(连词成句) When did she become a violinist的同义句