短文改错改错:About 80 million America are trying to lose weight.Th

短文改错改错:About 80 million America are trying to lose weight.That is almost one in each three people in the United States.Some eat less of certainly foods ,especially fat and sugar.Others take up medician ,exercise or even had operations.Lose weight is not easy ,but it can also cost lots of money.But why so many people in the U.S.want to lose weight Many people worry about not looking pretty.Other people are concerned at their health.Many doctors say that putting on too much weight is not healthy.Almost 40million people weight at least 20percent much than their usual weight.

【评注】
America 指美国,美国人应该用 American,About 80 million 意思是“大约8千万”,因此要用复数Americans“减肥”多用 fine down、reduce weight 或 pedal away the pounds,lose weight 不太地道.That is almost one in each three people in the United States 一句表意模糊,可能是是想说“在美国几乎每三人就有一个人是胖子”或者“在美国几乎每三人就有一个人想减肥”.前者应该说one of every there persons are fatties in the United States,后者可以用 one of every there personswould like to reduce his or her weight.certainly是副词,不能修饰名词；food 是不可数名词,不能用复数,改为 Some have a given amount of food for their meals.“服药”是 take medicine,此处最好改为 Others take diet pills (服用减肥药), do exercise or even go underthe knife (接受外科手术).Many people worry about not looking pretty 句子不通,改为 Many people worry themselveswith not looking pretty.Almost 40 million people weight 改为The weight of almost 40 million people is还有的地方没有评注,不过在正文中已经一一修改.
【修改后的全文】
　　About 80 million Americans are trying to reduce weight. One of every three persons would like to do so in the United States. Some have a given amount of food for their meals, especially fat and sugar. Others take diet pills, do exercise or even go under the knife. It is not easy to reduce weight, because it costs lots of money. But why so many people in the U.S. want to reduce weight? Many people worry themselves with not looking pretty. Others are concerned about their health. Many doctors say that putting on too much weight is not healthy. The weights of almost 40 million people are at least 20 percent much more than  usual.