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1、每题所给的A、B、C、D四个选项中z选出最佳选项，并在答题卡上讲该项涂平ARaceAgainstDeathItwasacoldJanuaryin1925inNorthAlaska.Thetownwascutofffromtherestoftheworldduetoheavysnow.Onthe20thofthatmonth,Dr.Welch___aSickboyzBilly,andknewhehaddiphtheria,adeadlyinfectious"专染白勺）diseasemainlyaffectingchildren.Th
2、echildrenofNomewouldbe___ifitstruckthetown.Dr.Welchneededmedicineassoonaspossibletostopotherkidsfromgettingsick.___,theclosestsupplywasover1,000milesaway,inAnchorage.HowcouldthemedicinegettoNome?Thetown's___wasalreadyfulloficezsoitcouldn'tcomebyship.Carsandhorsescould
3、n'ttravelonthe___roads.Jetairplanesandbigtrucksdidn'texistyet.__January26,Billyandthreeotherchildrenhaddied.Twemtymorewere___.Nome'stownofficialscameupwitha（n）__Theywouldhavethemedicinesentby___fromAnchoragetoNenana.Fromthere,dogeled（狗拉雪橇）drivers—knownas"mushers"—woul
4、d___ittoNomeinarelay（接力）.TheracebeganonJanuary27.Thefirstmusher,Shannon,pickedupthemedicinefromthetrainatNenanaandrodeallnight.___hehandedthemedicinetothenextmusher,Shannon'sfacewasblackfromtheextremecold.OnJanuary31,amushernamedSeppalahadto___afrozenbodyofwatercalled
5、NortonSound.Itwasthemost___partofthejourney.NortonSoundwascoveredwithice,whichcouldsometimesbreakupwithoutwarning.Ifthathappened,Seppalamightfallintotheicywaterbelow.Hewould___,andsowouldthesickchildrenofNome.ButSeppalamadeitacross.AhugesnowstormhitonFebruaryl.Amusher
6、namedKaasenhadtobravethisstorm.Atonepointzhugepilesofsonwblockedhis___.Hehadtoleavethetrail（雪橇痕迹）togetaroundthem.Conditionsweresobadthatitwasimpossibleforhimto___thetrailagain.TheonlyhopewasBalto,Kaasesleaddog,Baltoputhisnosetotheground,___tofindthesmellofotherdogstha
7、thadtraveledonthetrail.IfBaltofailedjtwouldmeandisasterforNome.Theminutespassedby.Suddenly「Baltobeganto___.HehadfoungthetrailAt5:30amonFebruary2,Kaasenandhisdog___inNome.Withinminutes,Dr.Welchhadthemedicine.Hequicklygaveittothesickchildren.AIIofthemrecoverd.Nomehadbee
8、n・AexaminedBwarnedCinterviewedDcured37.AharmlessBhelplessCfearlessDcareless38.AMoreoverBThereforeCOtherwiseDHowever39.Aairpo
