4．What does the text try to tell us?

　　A．To be patient with your customers.

　　B．Helping others is helping yourself.

　　C．To be thankful to those who help you.

　　D．It is our duty to do things for others.

　　答案　C

　　解析　主旨大意题。从最后一段中的叙述可看出，文章主要是想告诉大家：要学会感恩，要感谢那些帮助你的人。故选C。

　　B

　　Healthy Habits，Healthy Body

　　Feel tired lately？Has a doctor said he can’t find anything wrong with you？Perhaps he sent you to a hospital，but all the advanced equipment there shows that there is nothing wrong with you.

　　Then，consider this：you might be in a state of sub­health(亚健康)．

　　Sub­health，also called the third state or gray state，is explained as a borderline state between health and disease.

　　According to the investigation by the National Health Organization，over 45 percent of sub­healthy people are middle­aged or elderly.The percentage is even higher among people who work in management positions as well as students around exam­week.

　　Symptoms include a lack of energy，depression，slow reactions，insomnia(失眠)，agitation and poor memory.Other symptoms include shortness of breath，sweating and aching in the waist and legs.

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