one choice question… he（ ）in china for a few years and then went to Japan. A.worked B has been C.had been the right answer is B？ i can't understand. because he has gone to Japen. why not A or C I thought it was c, but the answer says B and “he was often palying basketball with me yesterday ”or“he often played basketball with me yesterday”.“he was playing basktebl with me yesterday”which one is right？