Mary: Hello, Lucy! What are you doing?
Lucy: I am sending some postcards. How about you?
Mary: I'm sending a letter. Where are you sending your postcards?
Lucy: I'm sending them to America. And where are you sending your letter?
Mary: I'm sending it to Canada.
Lucy: How much are the stamps?
Mary: I think they are ten yuan or more.
Lucy: That's too expensive (昂贵的).
Mary: I think so.
Lucy: Why not send an email on the computer?
Mary: That's a good idea. Let's go and find a computer.
Lucy: Can you write an email?
Mary: Yes, I can.
