第6部分：完形填空（第52~65题，每题1分，共15分）
下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。
Goingonadiet
Atypicalpersonneedsabout 1,800 caloriesperdaytostayalive. Thesecalorieskeepyourheart 1_______andyourlungsbreathing. Theykeepyourorgansoperating 2_______and, yourbrainrunning. Theyalsokeepyourbodywarm. Aperson 3______weightbecauseheorsheconsumesmorecaloriesperdaythanneeded. Theonlywaytolosefatisto 4______thenumberofcaloriesthatyouconsumeperday. Thisisthebasic 5______behindgoingonadiet.
Unfortunately，dietsdont 6______formostpeople. Theydoloseweightbutthengo 7______ thedietandputitback. Buildingasensibledietandexerciseplanisthekeyto 8______ aconsistentweight. Youneedtofigureouthowmanycaloriesyouneedinadayandhowmanyyou 9______ takein. Thenextstepistoadd ，exercisesothatyoucan 10______thenumberofcaloriesyoucanconsumeperday.
Exercisechartscanshowyouhowmanycaloriesdifferent 11______ofexercisecanburn. Burning 250 or 500 caloriesperdaycan 12______abigdifference. YoucanrideanexercisebikewhileyouarewatchingTVoryoucan 13______ thestairsinsteadoftheelevator. Findanexercise 14______. Exercisecanbealoteasierifthereissomeonetotalkto. Itsagoodideatowearfirm-fittingclothesifyouareonadiet. 15______clothingactsasareminderofwhatyouaretryingtoaccomplish.
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