Unit4PygmalionⅠ.阅读理解Weighingtoomuchcandamageyourhealth，andobesityisagrowingproblemforbothkidsandadultsaroundtheworld.Sleepmightbeoneanswertotheproblem.Anewstudyhasfoundthatelementaryschoolstudentswhoslepttoolittleweremorelikelytogainpounds.Paststudieshaveshownalinkbetweensleepinglessandweighingmore，butscientistshavehadatoughtimedetermining“which_came_first，the_chicken_or_the_egg”，saysJulieC．LumengoftheUniversityofMichiganinAnnArbor.Inotherwords，ithasn'tbeenclearwhetherkidswhoweightoomuchhavetroublesleeping，orwhethersleepinglessleadstoweightgain.Bothscenarios(可能出现的情况)seemedequallypossible.Togetabetterideaofwhichcauseswhich，Lumengandhercolleaguesinterviewedtheparentsof785thirdgradersfromaroundtheUnitedStates.Theparentsansweredquestionsabouthowwelltheirkidssleptthatyear.Threeyearslater，theparentsansweredthesamequestions.Bysixthgrade,18percentofkidsinvolvedinthestudywereobese.Thescientistsfoundnorelationshipbetweenweightandthestudents'raceorgender.Italsodidn'tmatterhowstricttheirparentswere，orwhethertheywereboysorgirls.Obesitystruckallofthesegroupsequally.Instead，sleepseemedtobethekeyfactor.Overthe3yearsofthestudy，thechildrenaveragedahealthy9.5hoursofsleepanight.Somekids，however，sleptalotmore—orless—thanothers.Forthesixthgraders，everyhourofsleepabovethe9.5—houraverage—waslinkedtoa20percentlowerriskofbeingobese.Sleepappeareddoublyimportantforthethirdgraders.Everyextrahourofsleeptheygotwaslinkedtoa40percentdropinobesity.1．WhatdoestheunderlinedsentenceinParagraph2imply?A．Scientistshavefoundtheexactcausesofchildren'sobesity.B．Thereisalwayssomethingdifficulttounderstandthroughtheory.C．Thecauseeffectrelationshipbetweenweightandsleepisn'tclear.D．Aperson'sweighthassomethingtodowiththeamountofhissleep.2．Whatdidtheinterviewfindout?A．9.5hoursofsleepanightisenoughforchildren.B．Themoreachildsleeps，thehealthierhewillbe.C．Sixgradersneedmuchmoresleepthanthirdgraders.D．One'sraceorgenderhasnothingtodowithhisweight.3．Howdoestheauthordevelopthepassage?A．Bylistingfigures.B．Bycomparingdifferentopinions.C．Byprovidingexamples.D．Byconductingasurvey.4．Whatisthesuitabletitleforthepassage?A．ThebenefitsofenoughsleepforchildrenB．SleepinglessincreasestheriskofobesityC．Whichcomesfirst，littlesleeporobesity?D．Howmanyhoursofsleepdochildrenneed?答案：[解题导语]本文是说明文。一项新的研究发现，睡眠过少的小学生更容易发胖。1．C“”解析：句意理解题。画线句表示的字面意思是先有鸡还是先有蛋，结合上下“文的内容可知，文章引用这句话是为了表明是睡眠少导致了肥胖还是肥胖导致了睡眠变”“少这个问题还没有定论。下文的Inotherwords,ithasn'tbeenclearwhetherkidswhoweightoomuchhavetroublesleeping,orwhethersleepinglessleadstoweightgain.Bothscenarios(可能出现的情况)seemedequallypossible”是解题的关键提示信息。2．D“解析：细节理解题。根据第四段中的Thescientistsfoundnorelationshipbetweenweightandthestudents'raceorgender”可知选D项。3．A解析：写作手法题。文章主要介绍了一项研究，并列举了很多同该研究相关的数据，故选A项。4．B“解析：标题判断题。根据文章内容尤其是第一段中的Anewstudyhasfoundthatelementaryschoolstudentswhoslepttoolittleweremorelikelytogainpounds”可知，本文主要介绍了一项新的研究发现，睡眠少会增加肥胖的概率。故B项作文章标题最佳。Ⅱ.阅读填空[2017·安徽合肥二检]Everybodyknowstheimportanceofdrinkingenoughwater.Asweallknow，drinkingwaterbenefitsyourskin，musclesandorgans.__1__...
