[单项选择]　第一篇 Exercise Lowers Employers’Health Costs 　　Companies can save millions in health-care costs simply by encouraging their employees to exercise a little bit，researchers reported on Friday． 　　They said obese(肥胖的)employees had higher health-care costs，but lowered those expenses by exercising just a couple of times a week-without even losing any weight． 　　Feifei Wang and colleagues at the University of Michigan studied 23，500 workers at General Motors． 　　They estimated that getting the most sedentary(惯于久坐的)obese workers to exercise would have saved about$790，000 a year，or about 1．5 percent of health-care costs for the whole group. 　　Company-wide．the potential savings could reach$7 1 million per year，they reported in the Journal of Occupational and Environmental Medicine 　　Of the whole group of workers．about 30 percent were of normal weight，45 percent were overweight(超重的)，and 25 percent were obese．Annual health-care costs averaged$2，200 for normal weight，$2，4
A. By taking more rest
B. By eating less．
C. By exercising a little bit．
D. By saving more money．

[单项选择]　第一篇 Exercise Lowers Employers’Health Costs 　　Companies can save millions in health-care costs simply by encouraging their employees to exercise a little bit，researchers reported on Friday． 　　They said obese(肥胖的)employees had higher health-care costs，but lowered those expenses by exercising just a couple of times a week-without even losing any weight． 　　Feifei Wang and colleagues at the University of Michigan studied 23，500 workers at General Motors． 　　They estimated that getting the most sedentary(惯于久坐的)obese workers to exercise would have saved about$790，000 a year，or about 1．5 percent of health-care costs for the whole group. 　　Company-wide．the potential savings could reach$7 1 million per year，they reported in the Journal of Occupational and Environmental Medicine 　　Of the whole group of workers．about 30 percent were of normal weight，45 percent were overweight(超重的)，and 25 percent were obese．Annual health-care costs averaged$2，200 for normal weight，$2，4
A. $790，000 per year．
B. $7.1 million per year．
C. $3,000per year
D. $7,300 per year．

[单项选择]　第三篇 　Exercise Lowers Employers‘Health Costs 　　Companies can save millions in health-care costs simply by encouraging their employees to exercise a little bit，researchers reported on Friday 　　They said obese(肥胖的)employees had higher health。care costs，but lowered those expenses by exercising just a couple of times a week——without even losing any weight. 　　Feifei Wang and colleagues at the University of Michigan studied 23，500 workers at General Motors． 　　They estimated that getting the most sedentary(惯于久坐的)obese workers to exercise would have saved about$790,000 a year．or about 15 percent of health—care costs for the whole group Company—wide，the potential savings could reach$7.1 million per year，they reposed in the Journal of Occupational and Environmental Medicine． 　　Of the whole group of workers，about 30 percent were of normal weight，45 percent were overweight(超重的)，and 25 percent were obese．Annual health—care costs averaged$2，200 for normal weight，$2,400 for the
A. By taking more rest．
B. By eating less．
C. By exercising a little bit．
D. By saving more money．

[单项选择]　第一篇Heat and Health 　　Extremely hot weather is common in many parts of the world.Although hot weather just makes most people hot,it can cause medical problems-and death. 　　Health experts say that since the year 1900,extremely hot weather has killed more people in the United States than any other natural event.One year-the unusually hot summer of 1980-heat caused about 1,700 deaths in the United States.In 1995,more than 600 people died in a similar heat wave in one city-Chicago. 　　To measure extreme heat,govemment weather experts have developed the Mean Heat Index.It measures the average of how hot it is felt all day on an extremely hot day.Experts say it is the total heat of a hot day or several hot days that can affect health.Several hot days are considered a heat wave.Experts say heat waves often become deadly when the nighttime temperature does not drop much from the highest daytime temperature. 　　The most common medical problem caused by hot weather is heat stress.Usually,i
A. About 1700.
B. Nearly 1900.
C. Around 1100.
D. Over 600.

[单项选择]One way in which exercise can improve our health is that it helps us to________.
A. lose weight
B. sweat
C. build muscles
D. gain confidence

[单项选择]第一篇 　　 March Madness 　　For the rest of the month, an epidemic (传染病) will sweep across the US. It will keep kids home from school. College students will ignore piles of homework. Employees will suddenly lose their abilities to concentrate. 　　The disease, known as "March Madness", refers to the yearly 65-team US men’s college basketball tournament. It begins on March 15 and lasts through the beginning of April. Teams compete against each other in a single elimination tournament that eventually crowns a national champion. 　　Nearly 20 million Americans will find themselves prisoners of basketball festival madness. 　　The fun comes partly from guessing the winners for every game. Friends compete against friends, husbands against wives, and colleagues against bosses. 　　Big-name schools are usually favored to advance into the tournament. But each year there are dark horses from little-known universities. 　　This adds to the madness. Watching
A. It starts on March 15.
B. It does not occur annually.
C. It is known as "March Madness"
D. It lasts through the beginning of April.