单项选择题

M: Look at the long waiting line. I’m glad you’ve made a reservation.
W: Because I know a lot of people now like eating out, especially on weekends.
M: Yes, what’s more, this place is very popular in this district.

Where are the speakers()。

A. At a hospital.
B. At a restaurant.
C. At a railway station.
D. At a booking office.