Haveyouevertakenpartina.阅读理解Haveyouevertakenpartinamarathon?Amarathonis42kmlong.Itisthelongestraceintheworld.Tomaketherunner’sbodywork,hardertrainingisquitenecessary.Arunnershouldstarttopreparefora

　　Haveyouevertakenpartina.阅读理解

　　Haveyouevertakenpartinamarathon?Amarathonis42kmlong.Itisthelongestraceintheworld.Tomaketherunner’sbodywork,hardertrainingisquitenecessary.Arunnershouldstarttoprepareforamarathonatleastthreemonthsbefore.Preparationmayhaveraces,manyhoursofrunningatdifferentspeedsandchangesindiet.Duringthetrainingtimetherunnermusteatafitdiet.Thedietshouldhavelotsofthingsneededintrainingtheplayers.

　　Intheearlydaysoftraining,runnersrun80kmperweek.Therunningisincreasedeverytwoorthreeweeksandatleasttwolongrunsperweekareneeded.Twoweeksbeforethemarathon,thetrainingprogrammebecomesless,from100kmperweekdownto60kmandthento30kminthefinalweek.Onthelasttwodaystheymaynotrunatall.

　　Breakfastshouldbeeatenatleastthreehoursbeforetherace.Easilydigested(消化)foodsuchascereal(谷类食物),toast(烤面包)andscrambled(碎的)eggsisbest,withasmuchfluid(液体)aspossible.Runnersshoulddrinkwaterabouthalfanhourbeforetherace.

　　()46.Whatisthelengthofamarathon?

　　A.100km.B.60km.C.42km.D.30km.

　　()47.Accordingtothepassage,whenshouldamarathonrunnerbeginhistraining?

　　A.Threeorfourmonthsbeforetherace.B.Aweekbeforetherace.

　　C.Amonthbeforetherace.D.Ayearbeforetherace.

　　()48.Whatshouldarunnerhaveforhisbreakfastonthedayoftherace?

　　A.Alightmeal.B.Abigmeal

　　C.Lotsofmeat.D.Easilydigestedfood.

　　()49.Playersmusthave__________inordertorunbetterinamarathon.

　　A.trainingatdifferentspeedsandchangesindiet.B.muchwater

　　C.lessonsbeforetheraceD.manyfruits

　　()50.Hardtrainingbeforeamarathoncan____________.

　　A.makethegamemoreinteresting

　　B.helptheplayerstomakemoreprogress.

　　C.keeptheplayershealthyD.havemorefans

　　要准确答案,谢咯