How to keep fit
【正确答案】：Nowadays more and more people are concerned about their health, but how to keep healthy? First, it is necessary to take some exercise every day. Research shows that getting plenty of exercise makes the heart beat faster and the lungs work harder. Second, eat more fruits, vegetables and less meat. Third, getting rid of bad habits like smoking and drinking is also an important way to keep healthy. Smoking and alcohol drinking injure one's health a great deal, and therefore should be given up. If people follow these three ways of keeping fit, they’ll greatly improve their health.
