A、40 B、80 C、120 D、160 C数字题。男士想预订一间大房和一间小房，女士的话中表明大房一晚25美元，小房一晚15美元。问题问住三晚的价格，即(25+15)x3=120。因此，正确答案为C。

M: We’ d like two rooms, a small room and a large room facing the garden.
W: Very good, sir. The small room is fifteen dollars a night, and the large room is twenty-five dollars a night.
Q: How much would the man pay for the rooms if he and his family stay for three nights?