在下列对话的每个空格中填上一个词，使对话完整、正确。
Ron: Hi, Sam. I'm going to the 1. office to send a postcard to my friend in China.
Sam: Me too. I want to buy some stamps 2. my father. Let's go together.
Ron: Well, are you 3. tomorrow? My classmates and I 4. go on Plumtree for an outing. Would
you like to go 5. us?
Sam: Really? That's a good 6. . I'd love to. What 7. shall we start?
Ron: Let's 8. it 6:30 in the morning.
Sam: By the 9. , where shall we 10. them?
Ron: At the school gate, shall we?
Sam: That's OK! See you tomorrow.
Ron: Goodbye!
