单项选择题
M: I paid 10 dollars for two books. I think they are too expensive. W: Expensive I paid 15 dollars for the same two books a few days ago.
A.She thought they were expensive. B.She thought they were cheap. C.She didn’t say.
A.The heater of this room. B.The cold weather. C.Long working hours.
A.A salesman. B.A doctor. C.A driver.