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Read the article and select the best answer. Article: Some weight-loss camps, which are rare in China just a few years ago, have sprouted in Beijing, Qingdao, Shenzhen, and other cities. Today about 15 percent of adults, or 200 million Chinese, are reportedly overweight. Of these, 90 million--about 7 percent--are obese . Experts say the obesity epidemic is spreading to children, though more slowly than in adults. The trend, they say, will have a huge impact on the health of China's citizens and economy. "We're seeing a very large proportion of children and adolescents who are quite heavy and aren't moving much," said Barry Popkin, a nutrition professor. Popkin carries out an ongoing health-and-nutrition survey of 16,000 households in China. He says more kids today are overeating and putting on weight "quite quickly". In just ten years China's childhood obesity rate has doubled, with the greatest gains coming in urban areas. "In big cities it's a big problem." Some experts blame the extra fat on a range of factors, many of them tied to China's rapidly changing economy and culture. The diets of Chinese adults and children are far higher in calorie-laden meats, fish, eggs, dairy products, fats, and sugars than ever before. In addition, kids--especially city dwellers--are more sedentary today and spend more time indoors in front of homework, television, computer games, and the Internet. Shuwen Ng, a health economist, says that kids in China now have pocket money, and they spend a portion of it on junk food. Ng adds that advertising and peer groups influence kids' food choices. Certain foods, such as new candies or fast food, have attractive features. China's childhood obesity rate still lags that of the United States, where some 15 percent of kids are said to be obese. But the long-term effects are equally serious. Question: According to the passage we know _ . Options: A: weight-loss camps was very popular in China six years ago B: about 290 million Chinese are overweight in China in all C: in China childhood obesity rate in rural areas is lower than that in major cities D: America's childhood obesity rate is lower than China's
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C

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Read the article and select the best answer. Article: Is It Worth Buying Organic Food? Organic food, grown without artificial chemicals, is increasingly popular nowadays. Consumers have been willing to pay up to twice as much for goods with organic labels . However, if you think paying a little more for organic food gets you a more nutritious and safer product, you might want to save your money. A study led by researchers at Stanford University says that organic products aren't necessarily more nutritious, and they're no less likely to suffer from disease-causing bacteria, either. The latest results, published in the Annuals of Internal Medicine, suggest that buyers may be wasting their money. "We did not find strong evidence that organic food is more nutritious or healthier," says Dr. Crystal Smith-Spangler from Stanford. "So consumers shouldn't assume that one type of food has a lower risk or is safer." For their new study, Smith-Spangler and her colleagues conducted a review of two categories of research, including 17 studies that compared health outcomes between consumers of organic against traditional food products, and 223 studies that analyzed the nutritional content of the foods, including key vitamins, minerals and fats. While the researchers found little difference in nutritional content, they did find that organic fruit and vegetables were 20% less likely to have chemicals remaining on the surfaces. Neither organic nor traditional foods showed levels of chemicals high enough to go beyond food safety standards. And both organic and traditional meats, such as chicken and pork, were equally likely to be harmed by bacteria at very low rates. The researchers did find that organic milk and chicken contained higher levels of omega-3 fatty acids, a healthy fat also found in fish that can reduce the risk of heart disease. However, these nutritional differences were too small, and the researchers were unwilling to make much of them until further studies confirm the trends. Organic food is produced with fewer chemicals and more natural-growing practices, but... Question: The new research questions whether organic food _ . Options: A: should replace traditional food B: has been overpriced by farmers C: is grown with less harmful chemicals D: is really more nutritious and healthier
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D

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Read the article and select the best answer. Article: In Greek mythology , fire is a gift form God, stolen from Zeus by Prometheus and handed over to humans suffering from cold. What could be more natural than sitting around a beautiful fire on a winter night, at a campsite in the Berkshires? Hard as it may be to believe, the fireplace--long considered a trophy , particularly in a city like New York--is acquiring a social shame. Among those who desire to be environmentally responsible, it is joining the ranks of bottled water and big houses. Sally Treadwell, a 51-year-old public relations executive in Boone, N.C., said nothing makes her happier than building a fire on a cold winter night. But most of the time she doesn't, because she feels too guilty about the damage it may do to the environment. Every time she builds a fire, it causes " _ ," she said. "It's a guilty pleasure". "The smoke from a fire smells very nice," said Diane Bailey, a senior scientist with the Natural Resources Defense Council in San Francisco. "But it can cause a lot of harm. The tiny particles can cause illness, and can cross into the bloodstream, causing heart attacks as well as worsening other conditions." Growing concerns about the air pollution and health problems caused by smoke from wood fires are urging a number of areas across the country to pass laws regulating them. Idaho offers a tax cut to people who replace uncertified wood stoves with "greener" ones; San Joaquin County in California forbids selling a home unless its wood stove is replaced with an E.P.A. certified one;and Palo Alto and other governments in California forbid wood-burning fireplaces in new construction. Certainly, many think otherwise. In any case, most fireplaces are used far too infrequently to cause any real damage to the environment, said Stephen Sears, the vice president of the Brick Industry Association, voicing an opinion shared by some. Perhaps not coincidentally, sales of wood-burning equipment dropped to 235,000 in 2009 from 800,000 in 1999, according to the Brick Industry Association. It also... Question: In terms of the regulations about wood fires we can learn from the passage that _ . Options: A: uncertified fireplaces are forbidden in Idaho B: some people are against the woodfire controlling regulations C: only energy-efficient wood stoves can be used in the US D: all the people support measures taken to control the use of fireplaces
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B