[简答]  二、阅读理解：阅读下面的短文，根据文章内容从A、B、C三个选项中选出一个最佳选项。CarcrashesarethetopkillerofAmericanteenagers.Mostofthecrashesresultfromdistracteddriving—notpayingattentiontotheroad.RyanDidonewasafifteen-year-oldpassengerinacarthathitatree.Hewasoneofthenation'smorethanthirtythousandvictimsoftrafficcrashesin2008.Nearlyfourthousanddeaths,abouttwelvepercentinvolveddriversagefifteentotwenty. Ryan'sfather,ThomasDidone,isapolicecaptaininMarylan.“Itwasaninexperienced,immaturedriverdrivingatnightwithacarloadofkids.Hewasdistracted,hewas　goingtoofast,anditendedupcausingonedeathandsomeseriouslyinjured.“Hesharesthestoryofhisson'sdeathtohelpeducateteensandtheirfamiliesaboutdistracteddriving.JimJenningsfromtheAllstateInsuranceCompanysaysthenumberonecauseofdistracted-drivingaccidentsisthemobilephone.Hesaystalkingonthephoneorreachingforitislikedrinkingfourbeersanddriving.“Ifyou'retextingwhiledriving,youaretwenty-threetimesmorelikelytogetintoanaccidentthansomebodywhoisn't.“Governmentandprivategroupsareusingpublicserviceannouncementsandeventstobringmoreattentiontotheproblem.Forexample,theinsuranceindustryrecentlyheldasafetyeventforteendrivers.Atfirst,nineteen-year-oldKevinSchumanneasilyavoidedlarge,inflatabledollsthrowninfrontofthecartorepresentchildren.Healsoavoidedorangeconesrepresentingtheedgeoftheroad.Then,aspartofthetest,hestartedtexting.Hehitseveralconesandatleastonedoll.“That'swhatreallyopeneduptheexperienceformetoprovehowbaditistoreallytextanddrive.“DebbiePickfordofAllstateInsurancesaysteensareespeciallyatriskfromdistracteddriving—andnotjustbecausetheylackexperienceontheroads.“Accordingtotheresearch,teensdon'treallyhavefullydevelopedbrainsuntilthey’retwenty-fiveyearsold.Youputthosetwothingstogetherandyougetamuch,muchhigherrisk.“Anewlawproposesagraduateddriverlicensingsystem.Graduatedmeansteenagersstartwithrestrictionslikeonnightdrivingandnumbersofpassengers.Theycouldnotgetafulldriver'slicenseuntilageeighteen. 1.Accordingtothepassage,isthemostlikelytoleadtoatrafficaccidentwhileyouaredriving．A．textingonthemobilephoneB．reachingforacellphone．C．talkingonthemobilephone2.Wecanlearnfromthesecondparagraphthat．A.driverswhoresultedinnearly4,000deathsareteenagersB.over30,000victimshavediedfromtrafficcrashessofarC.itwasatnightthatRyanDidonediedfromacaraccident3.Asafetyeventheldbyinsuranceindustrywasmeantto.A．attractmoreteenagerstotakepartinitB．drawenoughattentiontoteenagers'distracteddrivingC．makemoreteenagerspracticeavoidinglargebarriers4.Thepassageisprobablyfollowedbyaconcludingparagraphabout．A．muchhigherriskB．teenbraindevelopmentC．measurestobetaken5.Ofallthefollowing,whichisthebesttitleforthepassage?A．CarCrashes—theTopKiller.B．DistractedDriving—Let'sAvoid!C．DrunkenDriving—DangerousEnough！