单选题 Questions 173-176 refer to the following notice.
Westwood Hotel

As part of our commitment to provide the best service to our guests, routine maintenance on the water delivery system and pumps is scheduled to take place for the following date and time:
Tuesday, January 7th
9:00 a.m.-2:00 p.m.
During the above period, water supply in the hotel may be stopped temporarily. After the maintenance work is performed, the water may become discolored due to the sediment in the supply system. If this happens, please run the water for a while until it becomes clear again. If the water does not run clear after 3 minutes, please inform us of this problem, and then our maintenance personnel will take an immediate action. (Please note that decolorization itself does not pose a risk to health.)
In addition, the water pressure may fluctuate during the period of maintenance. Thus, we would appreciate it if you could shut off all the faucets in the tub and sink securely before leaving the room to prevent possible flooding.
If you would like to have more information on this, please feel free to call the front desk. We apologize for any inconvenience that this may cause. We wish you a very pleasant stay with us here at Westwood.

问答题 Why will there be interruptions in the water supply?
A. The water delivery system in the hotel is broken.
B. The water has been found to be contaminated,
C. A scheduled maintenance work will be carried out.
D. A new water delivery system will be installed.
单选题 When are the hotel guests asked to contact the staff?
A. If no hot water is coming out of the faucet
B. If the water continues to be discolored
C. If the water pressure is too low
D. If the sediment is not visible in the water
【正确答案】 C
【答案解析】中级问题
文中说，“如果3分钟后水还没有变清(If the water continues to be discolored)，请联系维修人员”。因此要求宾馆客人联系维修人员的情形是选项(B)，当水还没有变清时(If the water continues to be discolored)。
单选题 Which of the following is NOT said in this notice?
A. The water may run slowly at times.
B. The discolored water is not hazardous to health.
C. The water will be tested for contamination.
D. The guests can call the front desk if they are not sure of this scheduled work,
【正确答案】 C
【答案解析】高级问题
文中提到，水压变动可能导致水流不畅，但水变色本身对健康无害，具体事项请咨询前台。因此(A)、(B)、(D)都是涉及的选项，(C)则和文章无关。
单选题 What are the guests asked to do?
A. Close all the faucets tightly before they leave.
B. Clean the sediments in the tubs and sinks.
C. Allow the maintenance staff to access their rooms.
D. Avoid using the tub and sink until after 2:00 p.m.
【正确答案】 C
【答案解析】中级问题
对客人的要求如下：We would appreciate it if you could shut off all the faucets in the tub and sink securely before leaving the room to prevent possible flooding．(为了防止水溢出，请在出门前关掉浴盆和洗涤槽的水龙头。)所以正确答案是选项(A)。(B)、(C)、(D)则根本没有涉及。