C．The main activities of Halloween

　　D．Halloween―a festival connected with the dead

　　解析：选D　标题归纳题。文章主要介绍了西方节日——万圣节前夕的一些主要活动及它的起源和有人趁节日搞非法活动等情况。前三项不全面，不适合做标题。只有D项概括得最全面，故选D。

　　C

　　(2016·太原市第二学段测评)Companies can save millions in health­care costs simply by encouraging their employees to exercise a little bit.Researchers report that obese employees have higher health­care costs, but they can lower those expenses by

　　exercising just a couple of times a week — without even losing any weight.

　　Feifei Wang and his colleagues at the University of Michigan studied 23,500 workers at General Motors.They estimated that getting the most obese workers to exercise would have saved about $790,000 a year, or about 1.5 percent of health­care costs for the whole group.Company­wide, the potential savings could reach $7.1 million per year, according to their report published in Journal of Occupational and Environmental Medicine.

　　Of the whole group of workers, about 30 percent were of normal weight, 45 percent were overweight, and 25 percent were obese. Annual health­care costs averaged $2,200 for normal weight, $2,400 for the overweight, and $2,700 for obese employees. But among workers who did no exercise, health­care costs went up by at least $100 a year, and were $3,000

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