翻译Since when was this

翻译Since when was this Since when have you become active?翻译 Max learned Japanese by himself when he was thirty.同义句 Max----himself Japanese ----the----of thi since when Until last week i hadn't seen her since1978,___i had wondered where she was living.A.since thenB,since when C,from when D,from then on 求翻译及具体解答, when i was young翻译 NGUYEN .THI .TRANG翻译中文 越南文翻译中文：thi ____have you been travelling?since i was a boy.A Since when B When C for when 选择哪一个,为什么 _did you start riding?_ I was eight years old.when,when?when,since?为什么 这道题选A还是选C( )she was a child, she has lived in San Francisco.A.When B.From C.Since答案是C,为什么 怎么翻译的 Scientists say it may be ten years _____ this medicine was put to use.A since B before C after D.when 给出正确答案,理由和翻译 Scientists say it may be ten years _____ this medicine was put to use.A since B before C after D.when 给出正确答案,理由和翻译 ____ have you been travelling?Since I was a boy.A Since when B When应该选哪个?为什么? 翻译 what day is it today what day was yeaterday what time did you come to school thi 翻译一句话：Since when do you make mistakes? Since when has he been there?怎么翻译 It was after he got what he had desired _____ he realized it was not so important.A：that B：when C：since D：as并解释原因.最后标准翻译,请回答完整。还有翻译呢