阅读下列短文，从每题所给的A，B，C和D项中，选出最佳选项。

　　Every hour spent in watching TV, DVDs and videos as an adult reduces life expectancy by almost 22 minutes, a study suggests．And viewing TV for an average of six hours a day can cut short your life by five years．

　　The research claims that a sedentary lifestyle is as bad for health as smoking and obesity, because of the dangers caused by inactivity and the greater opportunities it offers for unhealthy eating．

　　The academics conducting the study set out to calculate the overall risk to life expectancy from watching television．Their research involved more than 11, 000 people over the age of 25．

　　Writing in the British Journal of Sports Medicine, they concluded．"TV viewing time may be associated with a loss of life, which is similar to other major chronic disease risk factors such as physical inactivity and obesity．"

　　The researchers, from the University of Queensland, used information from the Australian Diabetes, Obesity and Lifestyle Study, together with population and death rate data．

　　But they said： "Although we used Australian data, the effects in other industrialized and developing countries are likely to be similar, considering the large amounts of time spent watching TV and similarities in disease patterns．" In the United Kingdom, the average amount of time spent watching TV is four hours a day, compared with five hours in the United States．

　　Earlier this year, a separate study suggested the risk of developing type 2 diabetes and heart disease, or dying early, rises by as much as 20 percent after just two hours a day in front of the box．

　　England's Chief Medical Officer, Sally Davies, said： "Physical activity offers huge benefits and these studies back what we already know-that a sedentary lifestyle carries additional risks．We hope these studies will help more people realize that there are many ways to get exercise．"

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阅读理解

　　You can't escape the message that smoking is bad for you．But what if one or both of your parents smoke? You might be worried about their health, sick of smelling the smoke, or even a little embarrassed(尴尬的)by it．You can't order your mom or dad to stop smoking , but you can encourage them to quit．There are lots of good reasons．Here are some you can mention：

　　*Smoking will hurt their health．

　　*Smoking creates secondhand smoke, which you don't like．

　　*Smoking will make it hard for them to keep up with you because they might run out of breath easily．

　　If you think it will help, you could print out articles like this one to give it to your mom or dad．But what if your parent gets angry with you for bringing up the topic of smoking? People don't like to be reminded that they are doing something unhealthy, so it's possible that your parents will be insulted or angry, especially if they're worried they won't be able to quit．Maybe they have tried before and failed．

　　Remember to be kind and respectful when you discuss smoking with your mom or dad．Also rememeber that it is difficult to quit．Some people try several times before they're able to quit for good．Instead of yelling at the them, tell them that you love them and want them to enjoy many healthy years ahead．In time, your mom or dad may realize you are right about smoking．And if they do agree to stop smoking, be their biggest supporter．Ask if there's anything you can do to help them when they feel the urge to smoke．Maybe you could go for a walk, do a puzzle, or listen to music together．As they reach milestones, such as a month without smoking, be sure to celebrate the achievement．Way to go, mom! Way to go, dad!

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