补全对话。
Larry: What beautiful pictures!
Tom: No, they're not pictures. 1. ____________________.
Larry: Stamps? 2. ____________________.
Tom: They are used for posting letters.
Larry: 3. ____________________?
Tom: I've got more than 700 of them.
Larry: 4. ____________________?
Tom: I've been collecting them since I was five years old.
Larry: what are you going to be when you grow up?
Tom: I'm going to be a stamp designer (设计师).
Larry: 5. ____________________?
Tom: I'm going to study art really hard and go to an art college.
Larry: I hope your dream can come true.
Tom: Thank you.
