a year for obese employees who were sedentary (久坐的)．

　　But adding two or more days of light exercise — at least 20 minutes of exercise or work hard enough to increase heart rate and breathing — lowered costs by on average $500 per employee a year, the researchers found. “This indicates that physical activity behavior could lessen at least some of the negative effects of excess body fat, and in consequence, help lower the increasing health­care costs，” Wang and his colleagues wrote.

　　语篇解读：本文是一篇记叙文。公司要降低保健方面的费用，那就应该大力提倡员工多花时间锻炼身体。

　　8．The

　　researchers believe companies can spend far less on health­care costs by________.

　　A．encouraging employees to lose weight

　　B．limiting the number of obese employees

　　C．persuading employees to do physical activities

　　D．limiting the employment of sedentary workers

　　解析：选C　细节理解题。根据第一段第一句可知，公司要想在保健方面减少支出，就得鼓励员工多锻炼。故C项正确。

　　9．What does the underlined word “obese” in Paragraph 2 mean?

　　A．Too strong.B．Too tall.

　　C．Too big.

　　D．Too fat.

　　解析：选D　词义猜测题。根据第一段第二句以及第二段第二句可知，obese 意为“臃肿，肥胖”。故D项正确。

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