补全对话。
Mary: Hello, this is Mary.
Mr White: Hello, this is Mr White, Peter's father.
Mary: Hello, may I speak to Peter?
Mr White: Sorry, (1)________________.
Mary: Could you tell me when he'll come back?
Mr White: (2)________________. Can I take a message for him?
Mary: Please tell him that I hope he will come to my birthday party next Sunday.
Mr White: Thank you for inviting Peter to your party. By the way, (3)________________?
Mary: It will start at half past five.
Mr White: (4) ________________?
Mary: I am going to have it at Sichuan Restaurant near his office.
Mr White: OK. (5)________________.
Mary: Thank you. Good-bye. Mr White: Good-bye.
