Many people know the benefits of a healthy diet. At school, children learn to eat all kinds of healthy food. Now people know what kind of food is harmful to health. They also know that it is not good to eat too many sweets or fatty foods. So they choose to eat the best food.
In the past 20 years, many Americans have joined health clubs and exercised. Some people even bought sports equipment to exercise at home. But now people practice more than before. Only about one third of middle school students exercise three times a week. Others watch TV for at least an hour every day, and some students even sit in front of TV for more than three hours a day. So many middle schools have gained weight.
In China, students don't watch TV every day, but they often watch TV on weekends and holidays. Most students don't join health clubs, so some people seldom exercise. All people in the world enjoy good health and know how to make themselves healthier. They just need to do this.
There is a word in your article, is it a typo in the third and second lines?
Hope to adopt. Thank you ~ ~