A、7: 30. B、8: 00. C、8: 30. D、9: 00. D本题的问题关键词是when。对话中说到那天晚上只有7点和9点有位子，由于选项中没有7点，所以只有选9点，因此选D。

W: McDonald Restaurant. May I help you?
M: I’d like to book a table for a birthday party.
W: How many people?
M: Just 9. Oh, no. Mary may not come. 7 people, please.
W: What time?
M: 8: 00.
W: I am sorry. There aren’t any tables available at 8: 00. But we can give you one at 7: 00 or 9: 00.
M: A11 right. 9: 00 then.
W: May I have your name please?
M: Miller Brown. You know I am your regular customer.
W: Oh, yes, Mr. Miller. A table for 7 at nine for you.
M: Thank you.
6. How many people would Mr. Miller like to book a table for?
7. When is the table available that night?