单项选择题

You will hear 10 short dialogues. For each dialogue, there is one question and four possible answers. Choose the correct answer—A, B, C or D, and mark it in your test booklet. You will have 15 seconds to answer the question and you will hear each dialogue ONLY ONCE.
Where are the speakers

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