A. asks, has, is it round or flat, answers, it is, how do you know, asks, it isn't, don't.
B. Comes , says, wants, says, it isn't, doesn't need it, asks, does she like my butter..., I am, replies, it isn't that, doesn't.
C. Asks, sits, do you have, there is, answers, does he smoke?, asks, doesn't smoke, replies, is, are, does he come?, he doesn't come late, says, I am, you are,