单项选择题
W: Paul, are you taking the bus or the underground to your office M: My doctor suggests I walk, not even cycle.
A.Taking the bus. B.By bike. C.On foot.
A.What people think of the bus service. B.How many people are using the bus service. C.Which group of people use the bus service most often.
A.A student. B.A teacher. C.An officer clerk.