CarcrashesarethetopkillerofAmericanteenagers．Mostofthecrashesresultfromdistracteddrivingnotpayingattentiontotheroad．
RyanDidonewasafifteen-year-oldpassengerinacarthathitatree．Hewasoneofthenation'smorethanthirtythousandvictimsoftrafficcrashesin2008．Nearlyfourthousanddeathsabouttwelvepercentinvolveddriversagedfifteentotwenty．Ryan'sfatherThomasDidoneisapolicecaptaininMontgomeryCountyMaryland．Hesaid"Itwasaninexperiencedimmaturedriverwhofeltthathewasinvincible(不可战胜的)drivingatnightwithacarloadofkids．Hewasdistractedhewasgoingtoofastanditendedupcausingonedeathandsomeupsettingexperiencesandtragedyfortherestofthecommunity."
JimJenningsfromtheAllstateInsuranceCompanysaid"Thenumberonecauseofdistracted-drivingaccidentsisthemobilephone．Talkingonthephoneorreachingforitislikedrinkingfourbeersanddriving．Ifyou'retextingwhiledrivingyouaretwenty-threetimesmorelikelytogetintoanaccidentthansomebodywhoisn't．
Reachingforacellphonewhenit'sgoingoffyou'reninetimesmorelikelytogetintoanaccidentthannormallydriving"TheinsuranceindustryrecentlyheldasafetyeventnearWashingtonforteendrivers．
Atfirstnineteen-year-oldKevinSchumanneasilyavoidedlargeinflatabledollsthrowninfrontofthecartorepresentchildren．Healsoavoidedorangeconesrepresentingtheedgeoftheroad．Thenaspartofthetesthestartedtexting.Hehitseveralconesandatleastonedoll．
DebbiePickfordfromtheAllstateInsuranceCompanysaid"Teensareespeciallyatriskfromdistracteddriving—andnotjustbecausetheylackexperienceontheroads．Whatweknowfromresearchonteenbraindevelopmentisthatteensdon'treallyhavefullydevelopedbrainsuntiltheyaretwenty-fiveyearsold.Youputthosetwothingstogetherandyougetamuchmuchhigherrisk.”
小题1:Accordingtothepassage_____isthemostlikelytoleadtoatrafficaccidentwhileyouaredriving．