Notice：Medical Alert Dear Reader， Medical related emergencies are on the rise with more old people l

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Notice：Medical Alert
Dear Reader，
Medical related emergencies are on the rise with more old people living alone.More seniors are seeking an independent lifestyle and better quality of life.Over 1 in 3 people over the age of 64 will fall this year.Nearly half will not be able to get up without support.
Medical expenses can increase when a person is not given timely support.You can prevent a medical catastrophe with our 24­hour emergency response system.Our solution is highly recommended by doctors，healthcare professionals，and hospitals.
We are offering a FREE Medical Alert (警报) System to seniors or their loved ones who call now.For a limited time，there will be no set­up fees and the medical monitoring starts at less than one dollar a day.The system is top­ranked and easy­to­use.It is 100% waterproof and it can travel with you.Our new system can detect falls automatically.
Call Toll­Free(免费电话) 1­800­231­0167 and gain peace of mind.There is no long­term contract(合同)．Our medical alert professionals can walk you through everything over the phone.
The first 100 callers to order will receive：
•Free Medical Alert System($300 Value)
•24 Hours a Day /7 Days a Week LIVE Monitoring and Support
•Free Waterproof Wristband
•No Long­Term Contract
•Free Shipping (Mention Reader's Digest)
Don't wait until after a fall to give us a call.Take advantage of this special offer now to protect yourself or a loved one.
Call now Toll­Free 1­800­231­0167 and mention Reader's Digest.
Sincerely，
Jim Nelson
【语篇解读】　本文是应用文。文章是一则医疗警报系统广告。
21．Why are there an increasing number of medical related emergencies?
A．Many old people have no one to keep them company.
B．The overall health of the old is worse than before.
C．The old are not paying attention to their health.
D．Old people's quality of life is down.
解析：选A　推理判断题。由文章首句“Medical related emergencies are on the rise with more old people living alone.”可以推断，紧急医疗事故增加的原因是独居老人数量的上升。
22．What's the main advantage of the system mentioned in the text?
A．Being effective medicine.
B．Serving as a reminder.
C．Replacing doctors.
D．Improving health.
解析：选B　推理判断题。由第三段中的“Our new system can detect falls automatically.”可知，这款设备的主要作用是遇到突发的摔倒情况时能够及时“发出警报”。
23．What benefit can the first 100 callers to order get?
A．Purchase the system at $300.
B．Get a copy of Reader's Digest.
C．Get an automatic call­out system.
D．Avoid the trouble of a written contract.
解析：选D　细节理解题。由第四段中的“There is no long­term contract(合同)．Our medical alert professionals can walk you through everything over the phone.”可知，订购流程通过电话即可完成，不需要签署书面合同。