A、At about 4:30. B、At about 5:15. C、At about 6:30. D、At about 8:00. D题目询问到达底特律的时间。对话中多次出现时间，但在对话的后半部分中，男士选择了6：30起飞的航班，加上一个半小时的飞行

W: Hello, this is New York Airlines. What can I do for you, sir?
M: I’d like to make a reservation to Detroit, please.
W: Yes, of course. When?
M: On the 13th, late in the afternoon.
W: We have a flight at 4:30.
M: That’s too early, I’m afraid. Do you have a later one?
W: Let me see... The next flight is at 5:15, and there’s another at 6:30.
M: I’d better take the 6:30 one. By the way, how long does it take to get to Detroit?
W: About an hour and a half.
M: Fine, please reserve a seat for me, then.
9. What does the man want to do?
10. At what time will the man arrive in Detroit?