听力原文：M: Good morning.W: Good morning, sir.M: I'd like to enquire about flights to Pari

听力原文：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.

(18)

A．Traveler and agent.

B．Manager and worker.

C．Shop assistant and customer.

D．Classmates.