根据短文内容及首字母提示，填写所缺单词，使短文意思完整，每空限一词。(10分)
Teenagers live very busy lives now and often forget to think about their diets and exercise．The truth is, healthy eating along with regular exercise is the only way to k 小题1:      fit．
During your teenage years, it is important to give your body the energy it needs．Teenage g小题2:     need about 2,200 calories a day and boys need a bit m 小题3:     —doctors suggest 2,800 for teenage boys．50% of your calories should come f小题4:      rice, bread, vegetables and fruit．You also need to drink a lot of water, 6 to 8 glasses a day．Drinking e 小题5:  water will improve your skin and give you healthy hair．
E 小题6:      is something that can help to make you look good, feel good and be healthy．Experts(专家) suggest that teenagers s 小题7:      at least 30 minutes exercising, five times a week．W小题8:      you exercise, your body produces something that makes you feel r 小题9:．It can even help you sleep better at night and let you pay more a 小题10: when you study!