'how long have you (　)your mountain bike?' 'a year'

'how long have you (　)your mountain bike?' 'a year' How long have you ________ this bike? How long have you been to ShangHai?For a year. How long have you ()?A.borrow the book B.bought the bike C b How long have you had that bike over there?over （）do you go back to your hometown?twice a year,A how long B how long have you lived here A.until laet year B.not until l How about your plan made a year ago?Have you shown a timely How long have you been a teacher A：How long have you been away from your home town?B：Since th 改错：How long have you been starting your class? How long have you had your watch?这句话对吗?