2017年6月英语四级真题及答案PartIWriting(30minutes)Directions:Forthispart,youareallowed30minutestowriteanadvertisementonyourcampuswebsitetosellsomeofthecoursebooksyouusedatcollege.Youradvertisementmayincludeabriefdescriptionoftheircontent,theircondition,theirpriceandyourcontactinformation.Youshouldwriteatleast120wordsbutnomorethan180words.PartIIListeningComprehension(25minutes)说明：2017年6月大学英语四级考试全国共考了两套听力。本套的听力内容与第二套相同，因此本套听力部分不再重复给出。PartⅢReadingComprehension(40minutes)SectionADirections:Inthissection,thereisapassagewithtenblanks.Youarerequiredtoselectonewordforeachblankfromalistofchoicesgiveninawordbankfollowingthepassage.Readthepassagethroughcarefullybeforemakingyourchoices,Eachchoiceinthebankisidentifiedbyaletter.PleasemarkthecorrespondingletterforeachitemonAnswerSheet2withasinglelinethroughthecentre.Youmaynotuseanyofthewordsinthebankmorethanonce.Questions26to35arebasedonthefollowingpassage.Asifyouneededanotherreasontohatethegym,itnowturnsoutthatexercisecanexhaustnotonlyyourmuscles,butalsoyoureyes.Fearnot,however,forcoffeecanstimulatethemagain.During(26)exercise,ourmusclestireastheyrunoutoffuelandbuildupwasteproducts.Muscleperformancecanalsobeaffectedbya(27)called"centralfatigue,”inwhichanimbalanceinthebody’schemicalmessengerspreventsthecentralnervoussystemfromdirectingmusclemovements（28).Itwasnotknown,however,whethercentralfatiguemightalsoaffectmotorsystemsnotdirectly(29)intheexerciseitself,suchasthosethatmovetheeyes.Tofindout,researchersgave11volunteercyclistsacarbohydrate(碳水化合物的）(30)eitherwithamoderatedoseofcaffeine(咖啡因)，whichisknowntostimulatethecentralnervoussystem,orasaplacebo(安慰剂）without,during3hoursof(31).Afterexercising,thescientiststestedthecyclistswitheyetrackingcamerastoseehowwelltheirbrainscouldstill(32)theirvisualsystem.Theteamfoundthatexercisereducedthespeedofrapideyemovementsbyabout8%,(33)theirabilitytocapturenewvisualinformation.Thecaffeine,theequivalentoftwostrongcupsofcoffe...
