广州广二医院挂号:__ three years ago.A,since B,for C,about

__ three years ago.A,since B,for C,about We________(teachers)three years ago I first met Mary three years ago when we( ) in a middle school together. He has been away from China( )three years ago A HUNDRED YEARS AGO这个表达对吗？ Lily with her parents has been in the Greener China since three years ago. NewYork has a short history of some three hundered years. shall remain effective for a period of three years Eygpt 1000 years ago Anumber of years ago