A、250 Yuan. B、450 Yuan. C、650 Yuan. D、850 Yuan. B此题考点为推算。对话中提到私人温泉是三个人每小时250元。有打折，每增加一小时优惠50元。问题问两个小时多少钱。第一小时没有优惠为250元，第二小时优惠50元

W: What’s the most likely diagnosis in this case?
M: Most probably tuberculosis.
W: What’s against that diagnosis?
M: Well, the infected hasn’t had any change in the habit or lost weight.
Q: What are they doing now?

W: Good morning. Would you like the private hot spring room today? For three people, it would be 250 Yuan per hour
M: Are there any discounts?
W: Yes, It is 50 Yuan cheaper for each additional hour.
M: Then We’ll have two hours.
Q: How much will the man pay?