A typical person needs about 1, 800 calories per day to stay alive. These calories keep your heart beating and your lungs51. They keep your organs operating properly and your brain running. They also keep your body52. A person gains weight because he or she consumes more calories per day than needed. The only53to lose fat is to reduce the number of calories that you consume per day. This is the basic principle54going on a diet. Unfortunately, diets don’t55for most people. They do lose weight but then go off the diet and put it back. Building a56diet and exercise plan is the key to maintaining a57weight. You need to58how many calories you need in a day and how many you actually59. The next step is to60exercise so that you can raise the number of calories you can consume per day. 　　Exercise61can show you how many calories different forms of exercise can burn. Burning 250 or 500 calories per day can make a big62. You can ride an exercise bike while you are watching TV or you can climb the stairs instead of the elevator. Find an exercise partner. Exercise can be a lot63if there is someone to talk to. It’s a good idea to wear64clothes if you are on a diet. Tight clothing acts as a reminder of what you are trying to65. 　　51 Arunning Bbreathing Coperating Dworking 　　52 Awarm Bfit Chealthy Denergetic 　　53 Aprinciple Broute Cway Dmanner 　　54 Aafter Bback Cunder Dbehind 　　55 Afunction Bwork Cact Davail 　　56 Aprofessional Btailor made Csensible Dsimple 　　57 Aconsistent Bconstant Cmiddle Dlow 　　58 Amake sureBfind out Cfigure outDachieve 　　59 Aconsume Btake inCattain Dmake use of 　　60 Aadd Bgo up Cexceed Dgrow 　　61 Apictures Bfigures Cinformation Dcharts 　　62 AsenseBcontrastCdifference Dsignificance 　　63 Ahappier BeasierCfruitfulDfriendly 　　64 Afirm�瞗itting Bcomfortable Cloose Dordinary 　　65 AaccomplishBget toCachieveDcome true 　　參考答案：BACDB CACBA DCBAA