专题8阅读填空[2015·全国卷Ⅱ]Trainingforamarathonrequirescarefulpreparationandsteady,gradualincreasesinthelengthoftheruns
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Noonecansaywhichbrandwillworkbestforyouorfeelbestonyourfeet,soyouhavetorelyonyourexperienceandonthefeelofeachpairasyoushop
Whenyouhavefoundshoesthatseemright,walkinthemforafewdaystodoublecheckthefit
__37__.Asalways,youshouldstretch(伸展)atleasttenminutesbeforeeachruntopreventinjuries
Duringthefirstweek,donotthinkaboutdistance,butrunfiveminuteslongereachday
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Butduringthenextweek,setagoalofatleastamileandahalfperrun
__39__.Aftertwoweeks,starttimingyourself
__40__.Dependingonthekindofraceyouplantoenter,youcansetupatimetablefortheremainingweeksbeforetherace
A.AftersixdaysB.ForagoodmarathonrunnerC.