AAbout 70 million Americans are trying to lose weight. This is almost one out of （21）three people in the United States. Some people go on diets (节食). This （22） they eat less of certain foods, especially fats sugars.（23）people exercise with special equipment, take medicine, （24） even have surgery (手术). Losing weight is hard work, it can also cost a lot of money. So （25） do so many people in the United States want to lose weight? Many people in the United States are （26） for looking young pleasant. To many people,（27） good means being thin. Other people worry about their （28）. Many doctors say being overweight is unhealthy. But are Americans really （29）? Almost （30） million Americans weigh at least 20 percent 30than their proper weight. （ 31）,the United States is the most overweight country in the world. "The stored （32） of adult Americans weight 2,300 million pounds," said an American scientist. He said （33） off that stored energy would produce enough power for 900,000 ears to go 12,000 miles.（34） losing weight is hard work, many people want to find a fast easy （35） to take off fat. 第（21）题选 查看材料A.the
