If you are new to running, here is some advice for you. It is important     1     (warm)up and cool down properly before and after running, so you do not hurt yourself. A warm-up     2    (prepare) your body before you exercise. After a long run, you should jog     3     (slow)for ten minutes, then walk for five minutes. Such kind of warm-down relaxes your body after exercise.

Most of us say we don't have time for exercise. However, many experts say that exercise plays an important role in making our body healthy.     1     (do) exercise can bring us many advantages. It can reduce weight and the risk of heart disease. Exercise also brings good effects mentally(精神上).It can make us feel     2    (relax)and happy. Actually, exercise can be done in many simple    3     (way). For example, we can take the stairs rather than the lift. Also we can play sports with friends in our free time.

If you want to get fit, make friends with people     1     enjoy exercising. It may be the best way to stay in shape because     2     (go) to the gym is infectious (有传染性的), scientists claim. Staying physically active with someone else inspires you to run faster and further, according to the first study of its kind. But it’s bad news for men as the technique only works for women because they     3     (encourage) by each other. And another study found happiness spreads through social groups, and the closer you are to someone with a sunny character, the more likely you are to be happy as well.