Unit17Allthingsaredifficultbeforetheyareeasy.万事开头难。学习内容题材词数建议时间得分统计做题备忘PartAText1商业经济425/10Text2科普知识397/10Text3社会生活413/10Text4文化教育391/10PartB社会生活602/10PartC科普知识442/10PartADirections：Readthefollowingtexts.Answerthequestionsbloweachtextbychoosing[A],[B],[C]or[D].Text1TheUnitedStatesInterstateHighwaySystemisaninfrastructurefeatofunprecedentedproportions.Notonlydoesitjoinallfiftystatesintheuniontogetherallowingforrapidtransportofgoodsandpeople,butitalsohaslegitimateclaimtothetitleofthelargestpublicworkerprograminhistory.Theprojectwasmotivatedbybothmilitaryandeconomicgoals.Interestintheprojectexistedsincetheearly1940s,butwasdelayedbytheoutbreakofWorldWarII,followedbythepostwarrecovery.AlthoughapprovedbyCongressin1944,thebuildingdidnotactuallybeginuntil1956.ThepostwarprosperityinAmericaaccentuatedtheneedforsuchamassiveinfrastructureproject.AfterAmerica’ssuccessinWorldWarIIandrecoveryofitseconomyfromtheGreatDepression,thepopulation’sdisposableincomesoared,allowingmostfamiliestopurchaseautomobiles,previouslythoughtofasluxuryitems.Withthesuddenboomofcars,amoreefficientroadonwhichtotravelwasdesperatelyneeded,andtheinterstatehighwaysystemprovidedthat,allowingtravelerstosafelyandreliablyvisitotherstatesordestinationsclosertohome.Thesamesurgeincarownershipthatcreatedtheneedfortheinterstatehighwaysystemalsoprovidedthemeansbywhichtopayfortheproject.Anewtaxongasolineprovided90percentofthefundingfortheproject,andstatetaxescoveredtheremaining10percent.Withthenewhighwaysysteminplace,notonlycouldtravelersvisitpreviouslyunfeasibledestinationsontheirholidaysandvacations,butbusinessescouldtransporttheirproductstomarketsinotherstates,increasingcompetitionacrossthecountry,tothebenefitofconsumersandproductqualityalike.Themilitaryhadakeeneyeonthesystemaswell.TrooptransportwasnowpossibletoallcornersofAmericainarapidandefficientmanner,andthelongstretchesofstraighthighwaysinstantlyprovidedrunwaysformilitaryaircraftintimesofemergency.Thecountry,linkedtogetherbyanetwork,ofroadsthatgreatlyreducedtraveltime,couldnowmoreefficientlybedefended.Inthelastfortyyearsalone,17trillionmileshavebeentraveledontheUSInterstateHighwaySystem.ThosemilescanbeequatedtothreetripsaroundtheworldforeveryAmerican,atriptothemoonfor75millionpeople,orthreelightyearsinspace.Nomatterwhatfigureisused,thenumbersarestunning.TheinterstatehighwayhasgottenandcontinuestogetpeoplewheretheyneedtogoinAmerica,andatafractionofthetimeitwouldotherwisetake.1.TheoutbreakofWorldWarII[A]wastedprecioustimebydelayingtheInterstateHighwayproject.[B]hadapositiveimpactbycontributingtothemeansbywhichtheInterstateHighwaySystemwasbuilt.[C]delayedthestartoftheprojectbutresultedinmoremoneybywhichtofundit.[D]spurredthemilitarytothrowtheirsupportinfavoroftheInterstateHighwayproject.2.TheUSInterstateHighwaySystemwasbuiltmainly[A]torespondtourgentneedsthathadarisen.[B]inordertobetterdefendacountryinatimeofwar.[C]witheconomicandbusinessesinmind.[D]fromstatetaxpayerdollars.3.WhatcanweinferfromtheParagraph3?[A]Thetaxongasolinewasthemostefficientwaybywhichtofundthebuildingoftheinterstatehighwaysystem.[B]Theinterstatehighwaysystemwasanimmensefinancialburdenthatrequiredhugeamountsofresourcestocomplete.[C]Withoutthepostwarsurgeincarownership,fundingfortheinterstatehighwaysystemwouldhavebeeninsufficient.[D]Thosewhostood...
