----How about the two of us chatting online?      ---- ____ . It’s much cheaper than talking on the phone.

 — Your pencil case looks really beautiful.— ________. But in fact, Gina’s looks better than mine.

---Help yourself to some fish! ---_______.

–Excuse me, sir, but I don’t think you can smoke here.–Really sorry. I ______ this is a non-smoking area.

 ---_____________ are they?  --- They are fine.