How long has this bookshop been in buisness?___ 1982A since B from为什么选since而不选from?

翻译How long has this food store been in business? 填空:How long has Mr.Black been t_______in this school? How long has this factory been open这句话转变成这样可以吗How long has been factory open How long-this library-? I wonder how long ago this school_ A.has begun BI wonder how long ago this school_A.has begunB.beginsC.BeganD.had begun how long has it been since you have had this engine tuned ?麻烦人工翻译一下 How long has this shop(）?Abe openB been open C opened Dbeen opened how long this factory (开办) Which is correct.Please explain it.1)How long has it been since this company was established?2)How long has the company been established? 紧急求助英语,How long has this shopHow long has this shop________________?A.been open B.been opened请问大侠们选那个答案,请给出原因. I wonder how long ago this radio factory-----a has begun b begins c began d has started How long has it been since this company was established?since this company was established?是表语从句? how long has Jim been at this school?回答为什么要用since 3 years ago不用3 years ago?how long不是提问一段时间吗? how long has the meeting()?AbegunBstartedCoverDlasted 下面这个英语句子在语法上有错误吗?How long has your sister studied in this school? How long has the weather been like this?A,Ever since last night B,Two days agoC,Two days later Complete the sentences withhave/has been to/in,have gone to,go.How long _ you _ this village? how __is this book?— It has fifty pages.A、long B、length C、much D、deep 理由呢?