Yes.Why not?

why yes or why not Yes.Why not? Yes why not With me this sunday为什么用go why not Why or why not? why or why not why not等于why()() Could I sit here?__A yes,I could B No,please C why not D tha -The price of pork is still rising.-Yes.Why not _____ some c --Beijing is a good city --yes ,why not stay here for__two d is not it hard to drive downtown to work yes that is why I _ Why not go bowling with us,John?A.Yes,please B.Sounds great