外研版高中英语必修第三册单元测试题Unit 3

外研版高中英语必修第三册单元测试题Unit3Unit3Theworldofscience时间：100分钟满分：120分选择题部分第二部分阅读理解(共两节，满分40分)第一节(共15小题；每小题2分，满分30分)阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。AEarthquakerescuerobotshaveexperiencedtheirfinaltestsinBeijing.Theirdesignerssaythatwiththeserobots,rescueworkerswillbeabletohavemoretimetosavemorelivesduringanearthquake.Thisrobotlookinglikeahelicopter(直升机),iscalledthedetector-bot.It’sabout4meterslong,andittookabout4yearstodevelopthemodel.Itsmainfunctions(作用)aretocollectinformationfromtheair,andsendgoodsofupto30kilos,topeoplestuckinanearthquake.Thisrobothasahighquality360degreepanoramiccamera.Itcanworkdayandnightandwillalsobeabletosendthelatestpicturesfromthequakearea.Dr.QiJuntong,ChineseAcademyofScience,said,“Unlikeotherautomaticmachines,themostimportantfeatureofthisrobotisthatitdoesn’tneedadistantcontrol.Wejustsettheinformationoftheearthquake-struckareaonit,andthenittakesoff,andlandsbyitself.Itfliesashighas3,000meters,andasfastas100kilometersperhour.”Thisrobothasadifferentfunction—itcanchangeastheenvironmentchanges.Itsmainjobistosearchforanysignsoflifeinplaceswherehumanrescuersareunabletogo.Aswellasadetector(探测器)thatfindsvictims(遇难者)anddetectspoisonousgas,acameraisplacedinthe40-centimeter-longrobot,whichcanworkinthedark.Anotherusefortherescuersisthesupplybot,withits10-meter-longpipe.Peoplewhoarecaughtintheruinswillbeabletogetsuppliesincludingoxygenandliquids.Expertshavesaidthattherobotswillenterproduction,andserveaspartofthenationalearthquakerescueteamassoonasnextyear.1.Whichofthefollowingstatementsabouttherobotistrueaccordingtothepassage?A.Ithasn’tbeenputintoproductionsofar.B.Itisamachinewithalengthof10meters.C.Itisamachinecarriedbyahelicopter.D.Itweighsabout30kilos.2.Dr.QiJuntongthinksthisrobotisdifferentfromtheothersmainlybecause______.

A.ithasmorefunctionsB.ithasamoreadvancedcameraC.itcanchangeastheenvironmentchangesD.itcanworkbyitselfoncegiventheinformation3.Theunderlinedword“which”inparagraph5refersto______.

A.acamera B.adetectorC.arescuer D.adoctorBTeenagersinAmericaknowthatthey’llpossiblyneedtechnicalskillstofindgoodjobs,butanewsurveyrevealsthatinterestintechnology-relatedcareersmaybedecreasing.Thepercentageofboysaged13to17whoareinterestedinscience,technology,engineeringandmathorSTEMcareersdroppedfrom36percentin2017to24percentthisyear,accordingtoasurveybyJuniorAchievementUSA.TheamountofgirlsinterestedinSTEMcareersstayedunchanged.Butthe1,000surveyparticipantsstillnamedtechnologyasoneoftwokeyskillsthatwillbenecessarytopreparethemfortheirfuturecareers.“Kidsdon’tunderstandhowtechnologycanbeappliedtocareersinadditiontocomputers,andmayberobotics,”saidTammeraL.Holmes,presidentofaviationconsultingfirmAeroStarConsulting(航空咨询公司).“That’salltheyknow,sotheycan’treallytranslatethatinteresttocareerpathways.”WhenHolmeswasinhighschool,hermomsenthertoaneventthatfeatured(以……为专题)thepilotsfromWorldWarⅡ.Oneofthepilotstookherforarideandlethertakethewheel.“Immediatelythatwasthecareerforme,”shesaid.Womenremainoutnumbered(超过)bymeninfieldsliketechnology.Forpeopleworkingtoincreasethenumberofwomenintheseareas,thelackofgrowthingirls,interestinSTEMcareersisconcerning.Teenagegirlsaremoreinterestedthantheirmaleclassmatesinrunningaftercareersinwhichtheycanhelpothers,saidEdGrocholskifromJuniorAchievement.Evenwithalltheprogramsaimedatincreasinggirls’interestinSTEM,“Idon’tthinkwereallytalkthatmuchabouthowweimprovepeople’slivesthroughSTEM,”Grocholskisaid.Societyneedstodobetteratmakingthoseconnectionsforkids,saidKatherineLatham,founderofanengineeringfirm.Sheusedcivilengineeringasanexampleofacareerthatwillcontinuetobeimportant.However,thefactthatstudentsknowtheywillneedtechskillsintheirfuturecareersisencouraging.Thesecondskilltheysaidtheyneedisrelationship-building.“That’sgoingtobethenewtypeofengineers,”Lathamsaid.4.Whatisthepassagemainlyabout?A.Somesuccessfulexamplesofkidschoosingtechcareers.B.Reasonsbehindteenagers,decreasinginterestintechcareers.C.ThedifferenceinchoiceofjobsbetweenboysandgirlsinAmerica.D.Thepopularityoftechcareersamongkidsanditsreasons.5.Whatisthereasonbehindkids’losinginterestintechcareers?A.Theyseetechcareersasboring.B.Theyfindtechskillslessimportantthanbefore.C.Theydon’tthinktechcareerscanbringrewards.D.Theycan’tconnecttheirtechinterestwithfuturecareers.6.WhatcanwelearnfromGrocholski’swords?A.STEMcareershavenothingtodowithpeople’slives.B.TeenagegirlsareinterestedinrunningafterSTEMcareers.C.TherelationshipbetweenSTEMcareersandtheimprovementofpeople’slivesisn’texplainedenough.D.Teenagersdon’tknowhowtoimprovepeople’slivesthroughSTEM.7.WhatarousedHolmes’interestinhercareer?A.Asummercampforpilots.B.Herparents’wishforher.C.Areportaboutthelifeofpilots.D.Herflightexperiencewithapilot.CImaginearelayrace.Duringthisrace,anathleteholdsastickasherunsacertaindistance.Thenhepassesthesticktothenextrunner.Thatpersonrunsfaster,andthenpassesthesticktoathirdrunner.Nowimaginethattherunnersdonotpassastick.Insteadtheypassshinysilk,aswellasgold,fruit,andglass.Imaginethattheracedoesnotmoveforwardinjustonedirection.Insteadtherunnersgobackandforthalongaroad.Theytradegoodsallalongthisroute(路线)andateachendofit.Nowimaginethattherunnersarebusinessmen.Theyleadcaravans(商队)orlinesofcamelsthatcarrythingstosell.TheytravelontheancientSilkRoadtoearntheirliving.TheSilkRoadwasacomplextradenetwork.Itpassedthroughthousandsofcitiesandtowns.ItstretchedfromeasternChina,acrosscentralAsiaandtheMiddleEast,totheMediterraneanSea.BusinessmentraveledontheSilkRoadfromabout200B.C.toabout1300A.D.Thenseatravelbegantooffernewroutes.SomepeoplecalledtheSilkRoadtheworld’slongesthighway.However,theSilkRoadincludedmanyroutes—notjustonesmoothpath.Theroutesranthroughmountainsandacrossdeserts.Theypassedthroughanareathatnowincludes18countries.TheSilkRoadhadmanydangers.Thesedangersrangedfromhotsunanddeepsnowtothievesandwars.Onlyexperttraderscouldsurvive.TheSilkRoadgotitsnamefromitsmostprizedgoods.Peopleusedsilkasmoney.Theycouldpaytaxesorbuygoodswithit.Traderscarriedmorethanjustsilk,though.Theyhadgold,silver,andglassfromEurope.PeopleintheMiddleEastandAsiawantedthesethings.Businessmenalsotookhorsesfromflat,grassyareasincentralAsiaandbroughtthemtoChinaandotherareas.Thehorseschangedthewaypeoplefarmedandrantheirarmies.Indianbusinessmentradedsaltandrare,beautifulstones.Chinesemerchantstradedmedicineandchina.Theyalsotradedpaper,whichquicklyreplacedanimalskinsinthewest.BusinessmencarriedapplesfromcentralAsiatoRome.TheChinesehadlearnedtocombinedifferenttreestocreatenewkindsoffruit.Theytaughtthissciencetoothers,suchastheRomans.TheRomansbegantogrowapplesforfood.TheSilkRoadledtoworldwidecommerce2,000yearsbeforetheWorldWideWeb.ThepeoplealongtheSilkRoaddidnotshareonlygoods.Theyalsosharedbeliefs.Monks,priests,andotherfaithleaderstaughttheirreligionstoothers.TheSilkRoadcreatedpathwaysforknowledge,diplomacy,andreligion.8.Inwhichcolumnofanewspapercanwemostprobablyreadthearticle?A.Science. B.Travel.C.Sports. D.Culture.9.Peopleturnedtotheseafornewroutesafteraround1300A.D.because______.

A.theSilkRoadincludedmanyroutesB.theSilkRoadpassedthroughmanyareasC.peopletraveledontheSilkRoadfortoolongD.thereweremoredangersalongtheSilkRoad10.Whichofthefollowingisclosesttothemeaningoftheword“prized”inParagraph3?A.appropriate B.preservedC.valuable D.useful11.WhichofthefollowingstatementsisWRONG?A.TheSilkRoadhelpedspreadreligionstomorepeople.B.TheSilkRoadgavepeopletheideatobuildhighways.C.Somepeopleprobablydiedwhiletravelling.D.Westernersprobablyusedtowriteonanimalskins.DUSSpaceAgencyReturnstoMarswithInSightLanderTheAmericanspaceagency’slanderInSightistoarriveonMarsattheendofNovember,2018.UnlikeNASA’sCuriosityrover,InSightwillnotmoveacrosstheplanet’ssurface.Insteaditwillbecomethefirstspacecraft(航天器)usedonlyforexploringunderground.ItwillstudythegeographyofMars,searchingforsignsofMartian(火星的)quakes.InSightisaprojectofU.S.andEurope.Itis6meterslongand1.5meterswide.Itweighs360kilograms.InSight’s1.8-meterroboticarmwillputtwoexperimentsinplace.BotharedesignedtoexploreundergroundofMarstolearnabouttheinside.BruceBanerdtistheleadscientistforInSight.Heviewedthespacecraftasarobotthatcantakecareofitself.“It’sgotitsownbrain.It’sgotanarm.Itcanlistenandfeelthings.Itpullsitsownpoweroutofthesun,”henoted.ThomasZurbuchen,oneoftheheadsinNASA,saidtheresultsoftheInSightprojectcould“changethewaywethinkabouttheinsideofourearth.”But,first,InSightwillhavetolandonMarsundamaged.SinceMarsexplorationstartedinthe1960s,onlyabout40percentoftheexplorationshavesucceeded.TomHoffmanisInSight’sprojectmanager.Hesaidearliersuccessesdonotlessentheconcernsforeachnewexploration.“Thatwe’vedoneitbeforedoesn’tmeanwe’renotnervousandexcitedaboutdoingitagain,”hesaid.InSightwillentertheMartianatmosphere(大气层)travelingat19,800kilometersanhour.ItwillslowforlandingonawideflatareaonMars.Ifallgoeswell,InSightcouldcarryoutitsexperimentsinabout10weeks.TheInSightprojectisexpectedtocontinueforoneMartianyear,abouttwoyearsonEarth.12.Whatcanwelearnfromthepassage?A.InSighttravelsatanunchangedspeed.B.InSightistheprojectofAmericaandJapan.C.InSighthasthefunctions(功能)ofarobot.D.InSightismainlypoweredbythenaturalgas.13.Whatwillbeoneofthecontributions(贡献)oftheInSightprojectaccordingtoZurbuchen?A.ItwillhelpusunderstandthegeographyofMars.B.Itwillchangethewaywethinkabouttheinsideoftheearth.C.ItwillhelpcarryoutmoreexperimentsonMars.D.ItwillgetmoreinformationaboutthereasonsforMarsquakes.14.WhatisHoffman’sattitudetowardsthisexplorationoftheInSight?A.Confident. B.Satisfied.C.Concerned. D.Frightened.15.WhatisthedifferencebetweenInSightandNASA’sCuriosityrover?A.Thesize. B.Thedesign.C.Thespeed. D.Thetask.第二节(共5小题；每小题2分，满分10分)根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。Ambition(志向,抱负)isanecessaryqualityinlife.Itistheforcewhichdrivesusontousewhatevertalentwehavegot1,thesetalentswillnotbeusedforourownandothers’benefit.Withoutambitionwearejustjellyfishthatflopthoughlife.Weonlyreacttoevents:wedon’ttrytocontrolthem.

2.Firstofall,itcanbeunrealistic.Wemaynotbeabletoseethelimitsofourownabilities,sowedoambitiousthingsthatarecompletelybeyondus.Somepeoplecanseeourgoodqualitiesandourlimitationsobjectively.Theymaytellusthatwehaven’ttheability.Werefusetotaketheirevaluation.Wekeepontrying.Manyyearsandmanydisappointmentslaterweareforcedtoaccepttheirjudgment.Butwhatawasteoftimeourill-foundedambitionhascausedus!

Besides,ourambitioncanbetooconcentrated.Wedevoteourattentiontoonenarrowaim,suchasgettingdistinctionsinoursciencesubjects.Everythingthatmaydrawusawayfromthisaimiscutoutofourlives.Intheendwegetourdistinctions.Butweareisolatedbeingswhoonlycareaboutparticularexaminations.Andweprobablywon’tmakegoodscientists3.

Andourambitioncanbelimitedtolifelessobjectives.4Personswhofeelinferiortrytomakeupbyseekingtherespectofothersthroughowningtheseartificialsignsofworth.

5But,likeallblindforces,itmustbedirectedifnottocausedisaster.

A.Still,ambitioncanhaveseveraldisadvantagesB.BecauseourambitionmaymakeusamongselfishpeopleC.UnlesswehavegotsomedegreeofambitionD.sincewedon’thavethebreadthofviewnecessaryforgreatersuccessE.AmbitionisnecessaryinthelivesofindividualsF.AslongastightlycontrolledbytheheadandtheheartG.Wewanttogainmoney,orpower,ormembershipofsomecircles第三部分语言运用(共三节，满分40分)第一节完形填空(共15小题；每小题2分，满分30分)阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项。Forthousandsofyears,peoplehaveknownthatthebestwaytounderstandaconceptistoexplainittoothers.“Whileweteach,we1,”saidRomanphilosopherSeneca.Nowscientistsarebringingthisancientwisdomup-to-date.They’re2whyteachingissuchafruitfulwaytolearn.

Researchershavefoundthatstudentswhoteachothersworkharderto3thematerial,andapplyitmore4.Studentteachersscorehigheronteststhanpupilswho’relearningonlyforthemselves.Buthowcanchildren,5learningthemselves,teachothers?Oneanswer:Theycanteachyoungerkids.Somestudieshavefoundthatfirst-bornchildrenaremore6thantheirlater-bornsiblings(兄弟姐妹).ThissuggeststheirhigherIQsresultfromthetimetheyspendteachingtheirsiblings.

Noweducatorsareexperimentingwithwaysto7thismodeltoschoolwork.Theyengagecollegeundergraduatestoteachcomputersciencetohighschoolstudents,whothen8instructmiddleschoolstudentsonthetopic.Butthemostcutting-edgetoolisthe“teachableagent”—acomputerizedcharacterwholearns,tries,makesmistakesandasksquestionsjustlikeareal-world9.Computerscientistshavecreatedananimated(动画的)figurecalledBetty’sBrain,whohasbeen“taught”aboutsciencebymiddleschoolstudents.StudentteachersaremotivatedtohelpBetty10certainmaterials.Whilepreparingtoteach,theyorganizetheirknowledgeandimprovetheirunderstanding.Andastheyexplaintheinformationtoit,theyidentifyproblemsintheirown11.

Feedbackfromtheteachableagent12improvestheteachers’learning.Theagents’questionsdrivestudentteacherstothinkandexplainthematerialsindifferent13,andwatchingtheagentsolveproblemsallowstheemotionsoneexperiencesintoaction.14,it’stheemotionsoneexperiencesinteachingthathelplearning.Studentteachersfeel15whentheirteachableagentsfail,buthappywhenthesepupilssucceedastheygainprideandsatisfactionfromsomeoneelse’sachievement.

1.A.learn B.doubtC.grow D.practice2.A.valuing B.provingC.questioning D.assuming3.A.prepare B.preserveC.exchange D.understand4.A.officially B.effectivelyC.fluently D.carefully5.A.still B.even C.though D.once6.A.curious B.energeticC.independent D.academic7.A.add B.applyC.offer D.show8.A.aswell B.atonceC.inturn D.ofcourse9.A.teacher B.parent C.sibling D.pupil10.A.arrange B.mark C.master D.link11.A.thinking B.readingC.inspiration D.guidance12.A.shortly B.hardlyC.rather D.further13.A.ways B.cases C.places D.orders14.A.Inall B.AfterallC.Aboveall D.Forall15.A.satisfied B.sickC.pleased D.upset非选择题部分第二节语篇语法填空(共10小题；每小题1分，满分10分)阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。Currently,bothwomenandmen1.__________(surround)bymagazinesandwebsitesfulloftipsaboutdieting,exerciseandfashion.Gonearethedays2.__________allmenhadtothinkaboutwearinganicesuittobesmartandhandsome.Thingshavechanged.

Now,asurveyhassuggestedthat80%ofmenadmit3.__________(be)unhappyabouttheirbody.Thebiggestbodyissuesfor4.__________(they)werebeerbelliesandlackofmuscles.Somethinkitisbecause5.__________thepressureofinfluenceofrolemodelsweseeonTVandin6.__________(magazine).Peopleendupwithaperceptionofwhattheperfectbodyshouldlooklike.ButnoteverybodywantstoputintheefforttohaveperfectmuscleslikeArnoldSchwarzenegger.Anopportunisticdesignerhaseveninventedamuscle-enhancingshirt7.__________(make)thebuyerlookmoreofastrongman.

ButJoeWarner,theformereditorofMen’sFitnessmagazine,thinksthemuscle-enhancingshirtisjust8.__________trick.Hethinksmanypeopleinthecountryareoverweightandshouldaccepttheyneedtodomoreexercise9.__________(regular).Exerciseisalwaysgood.Butwemustn’tforgetbeautyisonlyskindeep.Characteris10.__________(important)thanappearance.

第四部分写作(满分40分)第一节应用文写作（15分）结合课文主题使用本单元词汇与句型,根据提示写一篇50词左右的短文。1.那位老师和一些学生在参观一家工厂。(alongwith)2.工厂墙上的开关孩子们是够不到的。(beyondone’sreach)3.在那里他们看到一个能精确控制温度的装置,这个装置附带有使用说明书。(accurately,attach)4.说明书提醒人们不要让那个装置伤到自己。(injure)第二节故事续写（25分）阅读下面材料,根据其内容和所给段落开头语续写两段,使之构成一篇完整的短文。续写的词数应为150左右。OneSundaymorning,GeorgeThomas,abakerinasmallNewEnglandtownwaswalkingthroughtownwhenhesawayoungboycomingtowardhim,swingingabirdcageintheair.Onthebottomofthecage,therewerethreelittlewildbirdsshakingwithcoldandfear.GeorgeThomasstoppedtheboyandaskedhimwhathegotthere.

Theboywashappyandtoldhimthattherewerejustsomeoldbirdsinthecage.Whenthebakeraskedhimwhathewoulddowiththeoldbirds,theboysaidcasuallythathewantedtotakethebirdshomeandplaywiththem.Hewouldpullouttheirfeatherstomakethemfight.Hewouldhaveareallygoodtimebecausehewouldenjoywatchingthese.

GeorgeThomaswasshockedbywhattheboysaid.Howcouldaboybesorudetowildanimals?Sohecontinuedtoasktheboywhathewoulddotothebirdswhenhegottiredofthem,becausehewassuchanaughtyandcruelboythathewassuretobetiredofthemsoonerorlater.Theboylaughedandsaidthathegotacat,whichlikedbirds,sohewouldgivethebirdstohiscat.Thebakergotmoreworriedanddecidedtohelpsetfreethepoorbirds.Soheasked,“Howmuchdoyouwantforthosebirds,son?”

Theboylookedathiminsurprise,wonderingifthebakerreallywantedtobuythem.Helaughedandremindedthemanthattheywerejustplainoldfieldbirds.Theydidn’tsingandtheywerenotevenpretty.However,thebakerinsistedandcontinuedtoaskhimhowmuchmoneyhewantedforthebirds.Theboystaredatthebakerasifhewerecrazyandsaid,“$10?”Paragraph1:Thebakerreachedinhispocket...Paragraph2:Thebakerpickedupthecage.参考答案：【阅读理解】A:1-3ADAB:4-7BDCDC:8-11DDCBD:12-15CBCD【七选五】1-5CADGE【完形填空】1-5ABDBA6-10DBCDC11-15ADACD【语法填空】aresurroundedwhenbeingthemofmagazinestomakearegularlymoreimportant【写作】【应用文】Theteacher,alongwithsomestudentsisvisitingafactory.Theswitchonthewallofthefactorywasbeyondthechildren’sreach.Theysawadevicethatcanaccuratelycontrolthetemperature,towhichthedirectionswereattachedtheyremindpeoplenottoinjurethemselveswithit.

【读后续写】Paragraph1:Thebakerreachedinhispocketandtookoutatendollarbill.Heplaceditintheboy’shand.Theboygraspedthemoneyfirmlyasifhewasafraidthatthebakerwouldchangehismind.Inaflash,thenaughtyboywasgone.Thebakerlookedattheboywalkingawayandshookhishead.

Paragraph2:Thebakerpickedupthecage.Andhegentlycarriedittotheendofthealleywheretherewasatreeandagrassyspot.Settingthecagedown,heopenedthedoor,andbysoftlytappingthebarspersuadedthebirdsout,settingthemfree.Thebakerwatchedthebirdsflyinginthesky,smiling.Hetooktheemptybirdcagehome.

Unit3Startingout&Understandingideas一、单词拼写1.Hehasa_____(渴望)forsuccessthoughhehasfailedmanytimes.2.Weallthoughtshewasacharming,intelligent,andvery_____(有能力的)youngwoman.3.Youcanchargeyourphonewiththeextra_____(电池)whereveryouare.4.Itasksyoutoactlikewater—tobe_____(柔韧的)aswellasstrong.5.Thisdevicehelpsmakevirtual_____(现实)amoreusableandaccessibletechnology.6.Youcangoanywhereandstillthe_____(指南针)pointsnorthorsouth.7.Suddenly,awhitelight_____(射出)towardsmyeyes,andIcouldseenothing.8.Whenhecameintothehouse,Drago_____(按)abuttonandthedoorclosed.用方框内短语的适当形式填空inaddition,inone'sopinion,intermsof,leadto,lookdown,neversaynever1.

___________,becauselimits,likefears,areoftenjustavirtualexistence.2.

Thetrafficaccidenthas

___________

36passengers'dying,and32passengers'beinginjured.3.

___________

money,nooneseemstobericherthanthegentleman,butdoesthatmeanhappiness?4.

___________,youarenotthesuitablepersontodothework.So,Isuggestyoufindanother.5.

We

___________

fromthetopofthemountain,andfoundtheriverwindingalongtheplain.6.

Itisabookworthreading,and

___________,itisquiteacheapone.三、阅读理解

Dogsareourbestfriends.That'sespeciallytrueafteradisaster,suchasanearthquake.Whenbuildingsfalldown,search-and-rescuedogshelpfindtrappedpeople.Dogs'amazingnosescanpickupthesmellofsurvivors.Nowscientistshavedevelopedanelectronictoolthatdoesthesamething.It'stakingsmelldetection(探测)toawholenewlevel.

Thenewinventionisasortofelectronicnose,whichcandetectextremelylowlevelsofmanycompounds(化合物)frompeople'sskin.Thisisn'tthefirsttimeengineershavedevelopedsuchanobject.Earliermodels,however,havebeenbulkyandexpensive.Theycouldnotdetectlowlevelsoftargetcompoundseither.Thenewoneisinexpensiveandsmallenoughtofitinsidehand-heldequipment.

Theelectronicnosecandetectextremelyslightsmellofmorethanonecompoundatthesametime."Beingabletodothis,insuchasmallobject,isthesignificantdiscovery,"saysSotirisE.Pratsinis,ProfessorofProcessEngineeringandMaterialsScienceattheSwissFederalInstituteofTechnologyinZurich.Histeamtesteditinspecialspaces.Theywerelikethesmallspaceswherepeoplemightbetrapped.Chemicalsgivenoffbythevolunteersbuiltupinside.Theelectronicequipmentdetectedthosecompoundsatunbelievablylowlevels.

Theresultsweregoodnewsfortheresearchteam.Buttheymaybenotforourfour-leggedfriends,whocouldsoonbeoutofajob."Ideally,thistechnologycouldreplacesearch-and-rescuedogs,"Pratsinissays.

StephenTaylor,anelectricalengineer,agreesthatthenewtechnologyhassomebenefitsoverdogs.Still,hethinksitmaybetoosoontohaveourtrustyfriendsretire.Hesuspects,"Iforeseethatsuchanobjectcouldaddtothefineworkdonebythedogs."Tayloralsopointsoutsomepotentiallimitationsofthenewinvention."E-nosesareuseful,butcanbeverylikelytobeaffectedbyunstablereadingsandinterruption,"hesays.1.Whydoestheauthortalkaboutdogsatthebeginning?

A.Tocatchthereaders'attention. B.Tointroducethetopicaboute-noses.

C.Toshowwhatsearch-and-rescuedogsdo. D.Toaddbackgroundinformationfordiscussion.

2.Whichofthefollowingbestexplains"bulky"underlinedinParagraph2?

A.Complex. B.Fragile. C.Handy. D.Large.

3.WhatisParagraph3mainlyabout?

A.Whate-noses'workingprincipleis.B.Howe-nosesaremade.

C.Whatdifferencesbetweendogsande-nosesare.

D.Howpowerfule-nosesare.

4.WhatdoesStephenTaylormean?

A.Dogsande-nosescouldworktogether. B.Search-and-rescuedogswillretiresoon.

C.E-nosesaremorereliablethannosesofdogs. D.Dogsarebetteratfindingouttrappedpeople.四、阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

Chinahasonceagainprovedits①_____(able)tochangetheworldwiththe"newfourgreatinventions":high-speedrailways,electronicpayments,sharedbicyclesandonlineshopping.

They'rerelatedtoChina'shigh-techinnovation(创新),

②_____hasimprovedthequalityofpeople'slives,accordingtoasurvey③_____(make)bytheBeltandRoadResearchInstituteofBeijingForeignStudiesUniversity.

"Mywalletisnolongerinuse.IcanbuyandeatwhateverIwantsi