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Teenagers are very busy at school now and often forget to think about their diets and sports. The truth is that healthy eating and regular exercise are t 1. ways to keep fit. D 2. your teenage years， it is important to give your body enough e 3. it needs. Young girls need about 2，200 calories a day. Usually boys need a bit m 4.， many doctors suggest 2，800 calories for teenage b 5.. 50% of your calories should come from rice， bread， vegetables and fruit. You also need to drink a lot of water， 6 to 8 glasses a day. D6. enough water will improve your dry skin and give you healthy body. Physical a 7.， such as playing basketball and swimming， are something that can help to make you look good， feel good and be healthy. Experts (专家) suggest that teenagers spend at l 8. 30 minutes exercising a day， five times a week. After you exercise a bit， your body produces something that makes you feel  r 9. and comfortable. It can even help you sleep better at night and let you p10. more attention when you study.