【新教材】2026年秋人教版九年级上册英语Units5-8 词性转换 专项练习题汇编（含答案解析）

一、单项选择题(共30小题)1.TheofpaperhasshA.inventB.inventionC.inventor2.CaiLun,agreat,improvedthA.inventB.inventionC.invento3.WeshouldtryourbesttomoreA.inventB.inventionC.inventor4.ThefactoryallkindsofplasticproductseA.produceB.productC.productionD.producer5.ThiskindofelectronicsellswellinA.produceB.productC.productionD.producer6.Theofcarshasincreasedby20%thismonthcomparedA.produceB.productC.productionD.producer7.YoucanthisdocumentontA.printB.printoutC.printerD.printingA.printB.printoutC.printerD.printing9.PleasegivemeaofthisreportbeforethemA.printB.printoutC.printerD.printingA.freezeB.frozeC.fr11.WaterwillA.freezeB.frozeC.frozenD.freezingA.completeB.completelyC.completionD.comple13.TheprojectwasfinishedaheadofA.completeB.completelyC.completionD.completedA.tourB.touristC.tourismD.touringA.TourB.TouristC.TourismD.A.realB.reallyC.realityA.realB.reallyC.realityA.realB.reallyC.realityA.responsibleB.responsibilityC.responsibly20.TakingcareofchildrenistheA.responsibleB.responsibilityC.responsiblyD.irresponsibleA.rapidB.rapidlyC.rapidsD.rapidA.rapidB.rapidlyC.rapidsD.rapid23.ThiskindofT-shirtisandofgoodquality,soitisverypopular.A.expensiveB.inexpensiveC.expensiA.officeB.officerC.officialD.officialA.workB.workerC.workshopD.workingA.certainB.certainlyC.certaintA.createB.creationC.creativeD.creatively29.Theofthenewparkhasbroughtmuchjoytothelocalpeople.A.createB.creationC.creativeD.creatively30.Thenewsspread二、用所给单词的适当形式填空(共30小题)1.ThomasEdisonwaso2.The(invent)ofthecompu4.Weshouldbuygreen(produce)topro5.The(produce)ofthisfactoryh6.Ineedto(print)these7.The(print)oft8.Thelake(freeze)lastnightbecauseofthecoldweather.18.Thepopulationis21.Thepolice(office)helpedth23.(certain),IwillhelpyouwithyourE25.Artistsareusuallyvery(26.The(create)oftheinternethasc28.Englishis(wide29.Theglueisnot(stick)enough.I30.Thingsimproved(gradual)afterwe三、完形填空(共3篇，每篇10小题)完形填空1CaiLunwasafamouspeopleusedmaterialslikebamboo,silkandanimalbonestowriteon.Butthesematerialeithertooexpen3,hegotanideafromthebarkoftrees,omaterialstogether,boiledthemandthenmadethemintothinpieces.Thisdhimforhisgreatwork.Afterthat,papermakingtechnologyspread6Later,itspreadtootherThe7ofpaperhashadahugeinfluenceonhumanhistory.Itmadeitorecordandspreadknowledge.Withoutpaper,thedevelopmentofbemuchslower.CaiLun's8workhasmadehimoneofthemostimportantpethinkingandhardworkcanleadtoamazinginventionsthatchan2.A.storeB.storedC.storageD.stori3.A.GradualB.GraduallyC.GraduationD4.A.cheapB.expensiveC.cheaplyD.expensively5.A.createB.creationC.creativeD.creatively8.A.valueB.valuableC.valuablyD.va9.A.contributeB.contributionC.contributorD.contributive完形填空2f inthe1980s.Sincethen,thetechandsenttothe3Dprinter.uplayersofmaterial,usuallyplastic.Today,3Dprinterscanmakealmosteverything,fromthefuture,itmaybepossibletoprinthumanorgansfortomakepartsformachines.Thishasincreasealsosomeproblems.Forexample,itisdifficulttocontroDespitetheseproblems,3Dprintingisa10te11.A.inventB.inventedC.inven14.A.produceB.producesC.product16.A.produceB.produced17.A.industryB.industrialC.industriall20.A.promiseB.promisingC.promisedD.promisingly完形填空3TheWrightbrothers,OrvilleandWilbur,weretwoAmeriWhentheywereyoung,theylikedtotakeaparttoysandputthembacktogether.alotofbooksaboutscienceandmachines.InThebrothersfacedmanychallenges.Thefirsbirdsfly.TheywatchedbirdstwAftermanyexperiments,theyaddedanTheinventionoftheairplanehas5changandeasier.Peoplecannowtraveltoanypartoftheworld6betweencountriesandmadTheWrightbrothers'storytellsusthatanyonecadeterminationhaveinspiredmanypeoplearoundtheworld.Today,weremembertheWrightbrothers2.A.flyB.flight4.A.achieveB.achievementC.achievableD.achiever5.A.completeB.completelyC.completionD.completed1.A.communicateB.communication2.A.inventB.inventionC.inv4.A.braveB.braveryC.bravelyD.b5.A.pioneerB.pioneering四、语法填空(共10小题)Stickynotesareoneofthemostpopularofficesuptheywereinventedbyaccident? (actual)producedaveryweakglue.Itcouldstickthingstchoir,butthepaperbookmarksalsticktothepagesbutcouldbereSuddenly,herememberedSilver'sweakglue.HeputsoTohis4(surprising),itworkedperfectly!ThesesmallpiecesLater,thecompanybegantoproducethesestickynotes.Atfirst,theywerenotButsoon,peoplerealizedhow5(use)Today,stickynotesareusedbymillionsofpeoplearoundthewofhowasmall6(create)ideacanch五、语法选择(共10小题)TheQinghai-XizangRailwayisoneofth Buildingtherailwaywasagreatchallenge.Thewopipeswereused4thegroundfrozeninsummer.Insomeplacesthelocalwildlifovercomeanydifficulty7weworktogether.ThhelpimprovetransportinothToday,therailway9bymillionsofpeopleeveryyear.Ithasbroughtpeoplecloser8.A.completesB.co13.A.increaseB.increased17.A.goodB.better一、单项选择题18.B解析：考查invent的词性转换。定冠词the后接名词作主语，invention意为“发明”,符合句意“纸的发明塑造了人类文明的发展”。invent是动词“发明”,inventor是“发明家”,inventive19.C解析：考查invent→inventor的转换。形容词great后接名词，inventor意为“发明家”,符20.A解析：考查invent的动词用法。tryone'sbesttodosth.意为“尽某人最大努力做某事”,21.A解析：考查produce的动词用法。句子缺少谓语动词，主语Thefactory是第现在时用produces,此处选项A为produce原形，符合语法结构(若为一般现在时应为produces,此处题目设计为考查动词词性)。22.B解析：考查produce→product的转换。形容词electronic后接名词，product意为“产品”,23.C解析：考查produce→production的转换。定冠词the后接名词作主语，production意为“产量”,符合句意“这个月汽车的产量比上个月增加了20%”。24.A解析：考查print的动词用法。情态动词can后接动词原形print,意为“打印”。25.C解析：考查print→printer的转换。定冠词The后接名词作主语，printer意为“打印机”,符26.B解析：考查print→printout的转换。不定冠词a后接名词，printout意为“打印件”,符合句27.C解析：考查freeze→frozen的转换。形容词frozen修饰名词snow,意为“结冰的；冻硬的”,28.A解析：考查freeze的动词用法。情态动词will后接动词原形freeze,意为“结冰”。29.A解析：考查complete的动词用法。needtodosth.意为“需要做某事”,此处需要动词原形30.B解析：考查complete→completely的转换。副词completely修饰动词finished,意为“完全地”,符合句意“在大家的努力下，这个项目完全提前完成了”。1.B解析：考查tour→tourist的转换。many后接可数名词复数，tourist意为“游客”,符合句意2.C解析：考查tour→tourism的转换。名词作主语，tourism意为“旅游业”,符合句意“旅游业3.C解析：考查real→reality的转换。动词face后接名词作宾语，reality意为“现实”,符合句4.A解析：考查real的形容词用法。形容词real修饰名词story,意为“真实的”,符合句意“这5.B解析：考查real→really的转换。副词really修饰形容词important,意为“真正地”,符合责”。7.B解析：考查responsible→responsibility的转换。定冠词the后接名词作表语，responsibility意为“责任”,符合句意“照顾孩子是父母的责任”。8.B解析：考查rapid→rapidly的转换。副词rapidly修饰动词running,意为“快速地”,符合句9.A解析：考查rapid的形容词用法。形容词rapid修饰名词breakfast,意为“快速的”,符合句10.B解析：考查expensive→inexpensive的转换。形容词inexpensive作表语，意为“便宜的”,符11.B解析：考查office→officer的转换。定冠词The后接名词作主语，officer意为“官员；职员”,12.C解析：考查work→workshop的转换。不定冠词a后接名词，workshop意为“作坊；车间”,符13.B解析：考查certain→certainly的转换。副词certainly修饰整个句子，意为“当然”,符合句14.B解析：考查suit→suitable的转换。besuitablefor是固定搭配，意为“适合……”。15.C解析：考查create→creative的转换。形容词creative修饰名词短语thinkingability,意为“创造性的”,符合句意“我们应该在课堂上培养学生的创造性思维能力”。16.B解析：考查create→creation的转换。定冠词The后接名词作主语，creation意为“创造物”,符合句意“新公园的建成给当地人带来了很多快乐”。17.B解析：考查wide→widely的转换。副词widely修饰动词spread,意为“广泛地”,符合句意二、用所给单词的适当形式填空18.inventors解析：考查invent→inventor的转换。oneof后接可数名词复数，意为“……之一”,故填inventors。19.invention解析：考查invent→invention的转换。定冠词The后接名词作主语，故填duced解析：考查produce的动词时态。根据时间状语lastyear可知用一般过去时，故填ducts解析：考查produce→product的转换。greenproducts意为“绿色产品”,用复数形式表示一类事物，故填duction解析：考查produce→production的转换。定冠词The后接名词作主语，production意为“产量”,故填production。23.print解析：考查print的动词用法。needtodosth.意为“需要做某事”,故填动词原形print。24.printing解析：考查print→printing的转换。定冠词The后接名词作主语，printing意为“印刷”,故填printing。25.froze解析：考查freeze的动词时态。根据时间状语lastnight可知用一般过去时，freeze的过去式是froze,故填froze。26.freezing解析：考查freeze→freezing的转换。形容词freezing修饰名词weather,意为“极冷的”,故填pleted解析：考查complete的动词时态。根据already可知用现在完成时，have后接过去分词，故填pletely解析：考查complete→completely的转换。副词completely修饰动词moved,故填29.tourists解析：考查tour→tourist的转换。many后接可数名词复数，故填tourists。30.Tourism解析：考查tour→tourism的转换。名词作主语，tourism意为“旅游业”,首字母大写，故填Tourism。1.reality解析：考查real→reality的转换。定冠词the后接名词作宾语，故填2.real解析：考查real的形容词用法。形容词real修饰名词man,故填real。3.responsibility解析：考查responsible→responsibility的转换。形容词性物主代词our后接名词，故填responsibility。4.responsibly解析：考查responsible→responsibly的转换。副词responsibly修饰动词act,故填responsibly。5.rapidly解析：考查rapid→rapidly的转换。副词rapidly修饰动词increasing,故填rapidly。6.rapid解析：考查rapid的形容词用法。形容词rapid修饰名词decision,故填rapid。7.inexpensive解析：考查expensive→inexpensive的转换。根据后半句“所以我能买得起”可知8.officer解析：考查office→officer的转换。policeofficer是固定搭配，意为“警察”,故填9.workshop解析：考查work→workshop的转换。不定冠词a后接名词，workshop意为“车间”,故填workshop。10.Certainly解析：考查certain→certainly的转换。副词修饰整个句子，首字母大写，故填11.suitable解析：考查suit→suitable的转换。besuitablefor是固定搭配，故填suitable。12.creative解析：考查create→creative的转换。形容词creative修饰名词people,故填13.creation解析：考查create→creation的转换。定冠词The后接名词作主语，故填creation。14.width解析：考查wide→width的转换。介词in后接名词，width意为“宽度”,故填width。15.widely解析：考查wide→widely的转换。副词widely修饰动词used,故填widely。16.sticky解析：考查stick→sticky的转换。形容词sticky作表语，意为“黏的”,故填sticky。17.gradually解析：考查gradual→gradually的转换。副词gradually修饰动词improved,故填完形填空118.C解析：考查office→official的转换。official意为“官员”,符合句意“作为一名宫廷官员，19.A解析：考查动词原形。and连接两个并列的动词不定式，to后接动词原形store,意为“储存”。20.B解析：考查gradual→gradually的转换。副词gradually修饰整个句子，意为“渐渐地”。1.A解析：考查形容词作表语。cheap意为“便宜的”,符合句意“这种新纸便宜、轻便且容易制作”。2.B解析：考查create→creation的转换。形容词性物主代词his后接名词，creation意为“创造物”,此处指他发明的纸。3.B解析：考查wide→widely的转换。副词widely修饰动词spread,意为“广泛地”。4.B解析：考查invent→invention的转换。定冠词The后接名词作主语，invention意为“发明5.B解析：考查value→valuable的转换。形容词valuable修饰名词work,意为“有价值的”。6.B解析：考查contribute→contribution的转换。形容词great后接名词，contribution意为献”。7.C解析：考查create→creative的转换。形容词creative修饰名词thinking,意为“创造性的”。完形填空28.B解析：考查被动语态。主语Thefirst3Dprinter和动词invent是被动关系，一般过去时的被动语态是was/were+过去分词，故填invented。9.B解析：考查rapid→rapidly的转换。副词rapidly修饰动词developed,意为“快速地”。10.B解析：考查被动语态。主语anobject和动词design是被动关系，一般现在时的1.B解析：考查动词时态。主语Theprinter是第三人称单数，一般现在时用produces。2.B解析：考查use→useful的转换。形容词useful作表语，意为“有用的”。3.B解析：考查动词时态。根据have可知用现在完成时，have后接过去分词produced。4.A解析：考查名词作宾语。industry意为“工业”,符合句意“3D打印对工业也有很大影响”。5.C解析：考查produce→production的转换。名词production作宾语，意为“产量”。1.A解析：考查名词作宾语。quality意为“质量”,符合句意“例如，很难控制3D打印产品的质量”。2.B解析：考查promise→promising的转换。形容词promising修饰名词technology,意为“有前完形填空33.C解析：考查create→creative的转换。形容词creative作表语，意为“有创造力的”。4.C解析：考查介词后接动名词。介词in后接动名词flying,意为“飞行”。5.B解析：考查solve→solution的转换。定冠词the后接名法”。6.B解析：考查achieve→achievement的转换。形容词great后接名词，achievement意为“成就”。7.B解析：考查complete→completely的转换。副词completely修饰动词changed,意为“完全8.B解析：考查communicate→communication的转换。名词作宾语，communication意为“交流”。9.C解析：考查invent→inventor的转换。不定冠词an后接名词，invento10.A解析：考查连词。although意为“虽然”,引导让步状语从句，符合句意“虽然他们失败了很多11.B解析：考查brave→bravery的转换。形容词性物主代词Their后接名词，bravery意为“勇12.A解析：考查名词作表语。pioneer意为“先驱”,符合句意“今天，我们纪念莱特兄弟作为飞机13.actually解析：考查actual→actually的转换。副词actually修饰动词produced,故填14.easily解析：考查easy→easily的转换。副词easily修饰动词separated,故填easily。15.damaging解析：考查介词后接动名词。介词without后接动名词damaging,故填damaging。某人惊讶的是”,故填surprise。17.useful解析：考查use→useful的转换。how后接形容词构成感18.creative解析：考查create→creative的转换。形容词creative修饰名词idea,故填19.failure解析：考查fail→failure的转换。名词作主语，failure意为“失败”,故填failure。20.inventors解析：考查invent→inventor的转换。both后接21.moreconvenient解析：考查形容词比较级。much修饰比较级，convenconvenient,故填moreco22.possibilities解析：考查possible→possibility的转换。形容词new后接名词，用复数形式表示“各种可能性”,故填possibilities。五、语法选择23.D解析：考查被动语态。主语It和动词complete是被动关系，根据时间状语in2006可知用一般24.C解析：考查现在分词作伴随状语。现在分词reaching25.B解析：考查create→creative的转换。形容词creative修饰名词ideas,故选B。26.C解析：考查固定搭配。beusedtodosth.意为“被用来做某事”,故选C。28.B解析：考查动词时态。根据has可知用现在完成时，have后接过去分词increased,故选B。29.A解析：考查连词。if意为“如果”,引导条件状语从句，符合句意“如果我们一起努力，就能克服任何困难”,故选A。30.B解析：考查过去分词作定语。过去分词learned表示被动关系，意为“从这个项目中学到的经验”,故选B。般现在时的被动语态，故选C。2.B解析：考查形容词比较级。makeourlivesbetter意为“使我们的生活更好”,用比较级表示和以前相比，故选B。一、单项选择题(共30小题)3.ChinahassentmanyA.manB.mannedC.menD.mann4.spacecraftsarealsA.UnmannedB.MannedC.ManD.Men5.TheA.maintainB.maintenanceC.maintainerD.maintainingA.launchB.launcherC.launchedD.laA.launchB.launcherA.weightB.weightlessC.weightyD.weightingA.weightB.weightlessC.weightyD.weighting10.TheoftheplanetsaroundtheA.moveB.movementC.movingD.movA.moveB.movementC.movingD.movA.geologyB.geologistC.geologicalD.geologA.geologyB.geologistC.geologiA.crazyB.crazilyC.crazin17.SheranafterthethiA.crazyB.crazilyC.crazinessD.craA.requireB.requiresA.requireB.requiresC.requirementsD20.ThemeetingwasbecauseofthebadweathA.cancelB.canceledC.cancellationD.canceling21.TheoftheflightmA.cancelB.canceledC.cancellationD.canceling22.ThebookwillbeA.publishB.publishedC.publisherD.publishing23.TheofA.publishB.publishedC.publisherD.publishingA.planetB.exoplanetC.planetaA.sunB.solarC.sunnyD.26.TheoriginoftheunA.mysteryB.mysteriousC.mysterA.mysteryB.mysteriousC.A.cooperateB.cooperationC.cooperativeD.cooperativelyA.cooperateB.cooperationC.cooperativeD.cooperativelyA.shipB.spaceshipC.shippingD.shi2.ThedoctorwillonthepatienttomoA.operateB.operatio二、用所给单词的适当形式填空(共30小题)3.China's(man)spaceprogramhasmadegr4.(man)robotsareus5.Weneedto(maintain)themachineregularlytokeepit6.The(maintain)ofthebuildingcostsa7.Therocket(launch)s9.The(weigh)of11.Thewind(move)thebranches13.Iusually15.Heisinterest16.The(geology)featuresofthisarea20.Safetyisthemostimportant(requi21.Theydecidedto(cancel)thepicnicbecauseoftherain.22.The(cancel)oftheconcertdisappointedmanyfans.23.Thisnewspaperis(publish)every24.The(publish)hasprinted10,00025.Scientistshavediscoveredmanynew(exoplanet)inrecen2.The(mystery)disappearanceoftheplanehaspuzzledpeopleformanyyears.3.Nooneknowsthe(mystery)oftheBe4.Thetwocompanieswill5.Thankyouforyour(三、完形填空(共3篇，每篇10小题)完形填空1China'sspaceachievementsaretheresultofthehardworkofmanyscientistsandengareproudoftheirgreatachievem2.A.manB.mannedC.menD.mann3.A.scienceB.scientificC.scientist4.A.amazeB.amazedC.ama6.A.astronautB.astronautsC.astronauticD.astronauti7.A.willingB.willingnessC.willD8.A.manB.manned9.A.universeB.universal10.A.braveB.bravfromEarth.IthastravelecompletingitsinhumanffromEarth.ItincludesmAlthoughVoyager1isveryofyears.Itisa7ofhumancuriosityandourdesiretoexploThe9ofVoyager11.A.amazeB.amazed13.A.achieveB.achievemen14.A.mysteryB.myste15.A.communicateB.communicationC.communicative20.A.determineB.determinationC.determinedD.determining完形填空3Livinginspaceisverydif1environment.Onnogravity,soeverythioffood.Astronautsalsohavetodoexerciseeverydaytostayhandbonesbecome7ifthonEarthbecausethereisnoatmospheretobl21.A.spaceB.spaceshipC.spaceflightD.space22.A.weightB.weightle23.A.differB.different24.A.sleepB.asleepC25.A.keepB.keptC.keeping28.A.exciteB.excited29.A.clearB.clearerC.clearestD30.A.prepareB.preparationC.preparedD.preparing四、语法填空(共10小题)onMarsonMay15,202ZhurongisnamedafterthegodoffiTheroverisequippedwithmany4(sciensoilandrocks.andlookforsignsof (amaze)photosoftheMartiansurface.Scientistsarevery6(excite)aboutthethembetterunderstandthe7(geology)andclimateofMars.Itwillalsohelpthemprepareforfuture8China'sMarsexpl五、语法选择(共10小题)isalsoknownastheChinaSpTheXuntiantelescopeweig ThemaingoaloftheXuntiantelescopeistostudytheuniverse.Itwillobservebillionsavewaterand6evenhavelifefTheXuntiantelescopeisagreat7scientistsaround3.A.willlaunchB.will4.A.powerB.powerfulC.powerfullyD.powered5.A.easyB.easier7.A.mysteryB.mysteries8.A.mayB.mustC.shou9.A.achieveB.ac一、单项选择题13.B解析：考查man→manned的转换。形容词manned修饰名词spaceships,意为“载人的”,符合14.A解析：考查man→unmanned的转换。形容词unmanned修饰名词spacecrafts,意为“无人的”,15.B解析：考查maintain→maintenance的转换。定冠词The后接名词作主语，maintenance意为“维护；保养”,符合句意“宇宙飞船的维护需要定期检查以确保其安全”。16.A解析：考查launch的名词用法。定冠词The后接名词作主语，launch意为“发射”,符合句意17.B解析：考查launch→launcher的转换。定冠词The后接名词作主语，launcher意为“发射器”,18.B解析：考查weight→weightless的转换。形容词weightless作表语，意为“失重的”,符合句意“宇航员在太空中会感到失重，因为没有重力”。19.A解析：考查weight的名词用法。定冠词The后接名词作主语，weight意为“重量”,符合句意“这个物体在地球上的重量是10公斤”。20.B解析：考查move→movement的转换。定冠词The后接名词作主语，movement意为“运动”,符合句意“行星绕太阳的运动是一种自然现象”。21.A解析：考查move的动词用法。助动词don't后接动词原形move,意为“移动”。22.B解析：考查sleep→asleep的转换。fall24.B解析：考查geology→geologist的转换。不定冠词A后接名词作主语，geologist意为“地质学家”,符合句意“地质学家是研究地球和其他行星地质的科学家”。25.A解析：考查geology的名词用法。定冠词the后接名词作宾语，geology意为“地质”,符合句27.B解析：考查crazy→crazily的转换。副词crazily修饰动词ran,意为“疯狂地”,符合句意29.C解析：考查require→requirement的转换。allthe后接可数名词复数，requirements意为求”,符合句意“我们已经满足了这份工作的所有要求”。30.B解析：考查被动语态。主语Themeeting和动词cancel是被动关系，一般过去时的被动语态是was/were+过去分词，故填canceled。消”,符合句意“航班的取消让很多乘客很生气”。2.B解析：考查被动语态。主语Thebook和动词publish是被动关系，一般将来时的被动语态是willbe+过去分词，故填published。3.C解析：考查publish→publisher的转换。定冠词The后接名词作主语，pu商”,符合句意“这本杂志的出版商在业内很有名”。4.B解析：考查planet→exoplanet的转换。不定冠词An后接名词作主语，exoplanet意为“系外行星”,符合句意“系外行星是指围绕太阳系外恒星运行的行星”。5.B解析：考查sun→solar的转换。形容词solar修饰名词system,solarsystem意为“太阳系”。6.A解析：考查mystery的名词用法。不定冠词a后接名词作表语，mystery意为“奥秘”,符合句7.B解析：考查mystery→mysterious的转换。形容词mysterious作表语，意为“神秘的”,符合句8.A解析：考查cooperate的动词用法。情态动词should后接动词原形cooperate,意为“合作”。9.B解析：考查cooperate→cooperation的转换。定冠词The后接名词作主语，cooperation意为“合作”,符合句意“两国之间的合作带来了许多成功的项目”。10.B解析：考查ship→spaceship的转换。不定冠词A后接名词作主语，spaceship意为“宇宙飞船”,11.B解析：考查crowd→crowded的转换。形容词crowded作表语，意为“拥挤的”,符合句意“春节12.A解析：考查operate的动词用法。情态动词will后接动词原形operate,意为“动手术”。二、用所给单词的适当形式填空13.manned解析：考查man→manned的转换。形容词manned修饰名词短语spaceprogram,故填14.Unmanned解析：考查man→unmanned的转换。形容词unmanned修饰名词robots,首字母大写，故15.maintain解析：考查maintain的动词用法。needtodosth.意为“需要做某事”,故填动词原形16.maintenance解析：考查mai