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二十一Animalsarenaturalresourcesthatpeoplehavewastedallthroughourhistory.Animalshavebeenkilledfortheirfurandfeathers,forfood,forsport,andsimplybecausetheywereintheway.Thousandsofkindsofanimalshavedisappearedfromtheworldforever.Hundredsmoreareonthedangerlisttoday.About170kindsintheUnitedStatesaloneareconsideredindanger.①Whyshouldpeoplecare?Becauseweneedanimals.Andbecauseoncetheyaregone,therewillneverbeanymore.Animalsaremorethanjustbeautifulandinteresting.②Theyaremorethanjustasourceoffood.Everyanimalhasitsplaceinthebalanceofnature(生态平衡).Destroyingonekindofanimalcancreatemanyproblems.Forexample,whenfarmerskilledlargenumbersofhawks(老鹰),thefarmersstoresofcornandgrainweredestroyedbyratsandmice.Why?Becausehawkseatratsandmice.Withnohawkstokeepdowntheirnumbers,theratsandmicemultiplied(繁殖)quickly.Luckily,somepeopleareworkingtohelpsavetheanimals.Somegroupsraisemoneytoletpeopleknowabouttheproblem.Andtheytrytogetthegovernmentstopasslawsprotectinganimalsindanger.Quiteafewcountrieshavepassedlaws.Theselawsforbid(禁止)thekillingofanyanimalsorplantsonthedangerlist.Slowly,thenumberofsomeanimalsindangerisgrowing.根据文章内容，选择正确答案：1.Animalsareimportanttousmainlybecause____.A.theygiveusasourceoffoodB.theyarebeautifulandlovelyC.theykeepthebalanceofnatureD.theygiveusalotofpleasure2.Whathashappenedtotheanimalsontheearth?A.Hundredsofkindsofanimalshavedisappearedforever.B.Manykindsofanimalshavediedout.C.About170kindsofanimalshavedisappearedforever.D.Allkindsofanimalsareindanger.3.WhichofthefollowingisNOTtrue?A.Peoplecaremuchaboutanimalsbecausetheyneedthem.B.Onceacertainkindofanimalsisgoneforever,therewillneverbeanymore.C.Killingallratsandmicemaycausesomeproblems.D.Peoplemustnotkillanyanimals.4.Whatcanweinferfromthefactthatquiteafewcountrieshavepassedlawsprotectinganimalsindanger?A.Everypersonwillknowtheimportanceofprotectingwildanimals.B.Animalsindangerwillnotbekilledanymore.C.Thenumberofsomeanimalsindangerwillincrease.D.Animalsindangerwillbekeptawayfrompeople.二十二Asonecomestosomecrossroads,heorsheseesasignwhichsaysthatdrivershavetostopwhentheycometothemainroadahead.Atothercrossroads,drivershavetogoslow,buttheydonotactuallyhavetostopunless,ofcourse,thereissomethingcomingalongthemainroad;andatstillothers,theydonothaveeithertostoportogoslow,becausetheyarethemselvesonthemainroad.MrWilliams,whowasalwaysaverycarefuldriver,wasdrivinghomefromworkoneeveningwhenhecametoacrossroad.Ithada“SLOW”sign.Hesloweddownwhenhecametothemainroad,lookedbothwaystoseethatnothingwascoming,andthendroveacrosswithoutstoppingcompletely.Atonceheheardapolicewhistle(口哨声),sohepulledintothesideoftheroadandstopped.Apolicemanwalkedovertohimwithanotebookandapeninhishandandsaid,“Youdidntstopatthatcrossing.”“Butthesigntheredoesn'tsay‘STOP’.”answeredMrWilliams,“Itjustsays‘SLOW’,andIdidgoslow.”Thepolicemanlookedaroundhim,andalookofsurprisecameoverhisface.Thenheputhisnotebookandpenaway,scratched(抓)hisheadandsaid,“Well，I'minthewrongstreet！”根据文章内容，选择正确答案：1.MrWilliamswasdriving____oneevening.A.toapartyB.tohisofficeC.homeafterworkD.toworkfromhome2.Whenhewasstoppedbyapoliceman,he____.A.wasdrivingatahighspeedB.wasdrivingontothemainroadC.wasgoingtostophiscarD.wasdrivingslowly3.Thoughslowly,MrWilliamscontinueddrivingatthecrossingbecause____.A.hedidn'tseeany“STOP”signthereB.hepaidnoattentiontothetrafficrulesC.hedidn'thavetostopD.hewaseagertogethome4.LookingroundMrWilliams,thepolicemanwassurprisedbecause____.A.hemetamadmanB.herealizedthathehimselfwasmistakenC.MrWilliamsdaredtospeaktohimlikethatD.MrWilliamswouldnotapologizetohim二十三Accidentshappenalmosteveryday.Someaccidentsarenotseriousandsomeare.Wereadaboutsuchaccidentsnearlyeverydayinthenewspapers.Itiswrongforpeopletothinkthataccidentstakeplaceonlyontheroadsorhighways,orevenatworkplaces.Homeaccidentsarejustascommon.Becauseveryfewhomeaccidentsarereported,peoplecometothinkthattherearefewaccidentswhichhappeninhomes.Therehavebeenmanycaseswherepeoplefalltotheirdeathsfromhighriseflats.①Childrenoftenfalloverwhilecomingdownthestairs.Oldpeoplemayslip(滑跤)onwetfloorsiftheyarenotcareful.Nowadaystherearealotofmodernelectricalappliances(电器)suchasricecookerswhichmakelifeeasyforthemodernhousewives.Theseappliancescankilliftheyarenotusedintheproperway.Gasstoves(煤气灶)usedforcookingarealsodangerousiftheyarenotproperlyused.Theymaycauseburnsor,inmoreseriouscases,evenfires.②Butallsuchaccidentscanbestoppedifwearecarefulandfollowsimplerulesofsafety.Forexample,itisunwiseforpeopletotryrepairingtheirownelectricalappliancesiftheydonotknowhowto.Itissafertogetthemrepairedbyanelectrician(电工).根据文章内容，选择正确答案：1.Accidentstakeplace____.A.mostlyinhomesB.mostlyonroadsandhighwaysC.mostlyinfactoriesD.almosteverywhere2.WhichofthefollowingaccidentsmayNOThappeninhomes?A.Peoplemayfalltodeathfromhighbuildings.B.Peoplemaybeknockeddownbycarsontheroads.C.Gasstovesmaycauseburnsorevenfires.D.Peoplemaybekilledbyanelectricalappliance.3.Peopleareadvised____.A.toavoidusingelectricalappliancesB.torepairtheirownelectricalappliancesC.nottorepairtheirownelectricalappliancesD.nottogettheirelectricalapplian