单项选择题

[听力原文]6-8
M: Good morning.
W: Good morning, sir.
M: I’d like to enquire about flights to Paris.
W: Yes, sir.
M: Could you tell me how often they go
W: Let me see. The first one leaves at seven in the morning, and then there’s one every hour till eight in the evening.
M: Sorry, what time does the last one leave
W: At eight, sir.
M: Thank you.
W: Pleasure, sir.

When does the second one leave（）

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