【阅读理解Theprivateautomobile(私家车)haslongplayedanimportantroleintheUnitedStates．InfactithasbecomeanecessaryandimportantpartoftheAmericanwayoflife．In1986sixty】

　　阅读理解

　　Theprivateautomobile(私家车)haslongplayedanimportantroleintheUnitedStates．InfactithasbecomeanecessaryandimportantpartoftheAmericanwayoflife．In1986sixty-ninepercentofAmericanfamiliesownedatleastonecarandthirty-eightpercenthadmorethanone．Bygivingworkersrapidtransportationtheautomobilehasfreedthemfromhavingtoliveneartheirplaceofwork．Thishasencouragedthegrowthofthecitiesbutithasalsoledtotrafficproblems．

　　Forfarmfamiliestheautomobileisveryhelpful．Ithasmadeitpossibleforthemtotraveltotownveryoftenforbusinessandforpleasureandalsototransporttheirchildrentodistantschools．

　　Familylifehasbeenaffectedinvariousways．Thecarhelpstokeepfamiliestogetherwhenitisusedforpicnicsoutingsandothersharedexperiences．Howeverwhenteenagechildrenhavetheuseofthecartheirparentscan’tkeepaneyeonthem．Thereisagreatdangerifthedriverhasbeendrinkingalcoholortakingdrugs－oris“showingoff”byspeedingorbreakingothertrafficlaws．Mothersofvictims(受害者)ofsuchaccidentshaveformedanorganizationcalledMADD(MothersAgainstDrunkDriving)．Thesewomenwanttopreventfurthertragedies(悲剧)．Theyhaveworkedtoencouragethegovernmenttolimittheyoungestdrinkingage．StudentshaveformedasimilarorganizationSADD(StudentsAgainstDrunkDriving)andarespreadingthesamemessageamongtheirfriends．

　　FormanyAmericanstheautomobileisanecessity．Butforsomeitisalsoamarkofsocialpositionandforyoungpeopleasignofbecominganadult．AltogethercarsmeanverymuchtoAmericans．

　　(1)

　　In1986________ofAmericanfamiliesdidn’thavetheirowncars．

　　[]A．

　　sixty-ninepercent

　　B．

　　thirty-eightpercent

　　C．

　　threetenths

　　D．

　　sixtenths