A: Good afternoon, my room number is 321. Any mail for me?
B: Yes. You have two letters and one telegram, also a message was left by a lady before one hour.
A: Let me see who called…?I have to make a phone call.Will you get me the party?Here is the number.
B: OK. Wait for moment…Here is your party.
A: Thank you.I'll mail a letter to U.S.A. by airmail. How much do I have to pay for you?
B: A letter generally mall to America- Europe- Africa by airmail. First 20 grams is 20 yuan.Each additional 20grams is 15 yuan.
A: Oh, I see. Thank you very much.