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.