—I’m sorry to have kept you waiting.

—_______,Bill.

A.You’re welcome                                           B.Go ahead

C.Don’t mention it                                           D.No problem

—I’m sorry to have kept you waiting.—__________, Bill.

A. You’re welcome   B. Go aheadC.  Don’t mention it  D. No problem

—I’m sorry to have kept you waiting.

         —______, Bill.   

        A. You’re welcome   B. Go ahead    C. Don’t mention it     D. No problem

 —I’m sorry to have kept you waiting.

—_______,Bill.

A.You’re welcome                           B.Go ahead

C.Don’t mention it                         D.No problem