A: hi B.B:hi A. that is the first time i see you smoking.A: i quit smoking for a long time, but i start smoking again.B: i never smoke. when i smell the smoke, i get headache.A: oh, i am so sorry. you know, i never smoke at public placeB: i see. smoking in the public places is not polite.A: that is why i always smoking at corner that has nobody.B: people should do something like you.A: yes, but i hope that everybody can quit smoking.B: that will be difficult.A: but it would happen some day.B: i hope so. i have to go to work? i will talk to you later.A: bye.