答案:C;A.Yes,please是的,介意;B.NO,you'dbetternot不,你最好别用;Ofcoursenot,goahead当然不介意,请便;对于mind的回答,表示不介意的方式有Notatall.No,Idon't.Ofcoursenot.Idon'tmind;表示介意的方式有Sorry,Iamafraid,You'dbetternot等;根据上句wouldyoumindifIuseyourdictionary?可知答语应为Ofcoursenot,goahead,表示不介意;故选C.