题目内容：

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏词符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（﹨）划掉。

修改：在错的词下划一横线（___），并在该词下面写出修改的词。

注意:1.每处错误及修改均仅限一词；

2．只允许修改10处，多者（从第11处起）不计分。

About 70 million American are trying to lose weight. That’s almost one out of three in United States. Some ate less of certain foods, especial fat and sugar.   

Others exercise, take medicine or even have operations. Losing a weight is not easy, and it can also cost lots of money. And why do many people in the US want lose weight? Many people worry for not looking young and pretty. Other people worry about health. Many doctors say putting on too much weight are not healthy. Almost 30 million people weigh at least 20 percent much than their usual weight.