ACT全套模拟测试题及详细答案解析

ACT全套模拟测试题及详细答案解析本套试题严格参照官方ACT考试题型、难度、出题逻辑编制，包含英语、数学、阅读、科学推理四个必考模块，题型贴合真实考场，解析详细易懂，适合备考刷题、模考自测。考试说明1.ACT英语：75题，45分钟，考查语法、标点、句式结构、文章修辞与逻辑2.ACT数学：60题，60分钟，考查初高中基础数学、代数、几何、统计概率3.ACT阅读：40题，35分钟，包含小说、社会科学、人文、自然科学四篇文章4.ACT科学推理：40题，35分钟，考查图表分析、实验推理、科学逻辑第一部分ACT英语（精选20题）Directions:Inthefollowingpassage,somewordsandphraseshavebeenunderlined.Choosethebestoptionforeachunderlinedportion.Iftheoriginalversionisbest,select“NOCHANGE.”Passage:MorningCommunityGarden(1)EverySaturdaymorning,asmallgroupofneighborsgathersatthecommunitygardentheyhavetendedforoverfiveyears.(2)Theyplantvegetables,trimflowers,andremoveweeds,theyalsosharestoriesandhomemadesnackswhiletheywork.(3)Manyofthegardenersareretiredresidents,butseveralteenagersjoininafterfinishingtheirpart-timejobs.1.Thebestrevisionforsentence2is:A.NOCHANGEB.Theyplantvegetables,trimflowers,andremoveweeds;theyalsosharestoriesandhomemadesnackswhiletheywork.C.Theyplantvegetables,trimflowers,andremoveweedstheyalsosharestories,andhomemadesnackswhiletheywork.D.Theyplantvegetables,trimflowers,andremoveweeds,alsosharingstoriesandhomemadesnacks,whiletheywork.2.Whichchoicebestmaintainsthesmoothflowoftheparagraph?A.NOCHANGEB.Moreover,C.However,D.Therefore,(4)Lastspring,thegroupdecidedtoexpandthegardentoincludeanativeplantsection.(5)Nativeplantsrequirelesswater,theyadaptwelltothelocalclimate,andtheysupportlocalbutterfliesandbees.(6)Beforestartingtheproject,membersresearcheddozensofplantspecies,consultedalocalenvironmentalexpert,andcreatedadetailedplantingplan.3.Thebestrevisionforsentence5is:A.NOCHANGEB.Nativeplantsrequirelesswater,adaptwelltothelocalclimate,andsupportlocalbutterfliesandbees.C.Nativeplantsrequirelesswater;theyadaptwelltothelocalclimateandsupportlocalbutterflies,andbees.D.Nativeplantsrequiringlesswater,adaptingwelltothelocalclimate,andsupportinglocalbutterfliesandbees.4.Theverbtenseinsentence6is:A.CorrectasisB.Shouldchange“researched”to“haveresearched”C.Shouldchange“created”to“create”D.Shouldchange“consulted”to“consult”(7)Onsunnyweekends,thegardenbecomesalivelygatheringplace.(8)Childrenrunalongthestonepaths,adultschatsoftly,andthewholespacefeelswarmandwelcoming.(9)Formanyresidents,thegardenismorethanjustaplacetogrowfood,itistheheartoftheirneighborhood.5.Thebestrevisionforsentence9is:A.NOCHANGEB.itistheheart,oftheirneighborhood.C.itbeingtheheartoftheirneighborhood.D.itistheheartoftheirneighborhood.剩余15道英语语法题（高频考点）6.Neithertheteachernorthestudents___readyfortheunexpectedfieldtripchange.A.isB.areC.wasD.has7.Theoldbookstore,___windowsarefadedandwooden,remainsapopularlocalspot.A.itsB.whoseC.whichD.that8.Afterhikingforthreehours,thegroupfinallyreached___campsitebeforesunset.A.theirB.thereC.they’reD.theirs9.Theathletetraineddaily;___,shewontheregionalcompetitioneasily.A.howeverB.thereforeC.otherwiseD.meanwhile10.Readingbooks,exploringnature,and___aregreatwaysforteenagerstorelax.A.creatingartB.artcreationC.tocreateartD.createdart11.IfIhadknownaboutthemeetingearlier,I___attendeditontime.A.willhaveB.wouldhaveC.hadD.would12.Themost___partofthetripwaswatchingthesunriseoverthemountains.A.memorableB.memorablyC.memoryD.memorizing13.Eachofthevolunteers___auniquetasktocompleteduringthecommunityevent.A.haveB.hasC.havingD.hadhave14.Themuseumdisplaysartifacts___datebackovertwothousandyears.A.whatB.whoC.whichD.where15.Shepracticedthepianodaily___shecouldperformperfectlyattheconcert.A.sothatB.becauseC.whileD.though16.Walkingquickly,___managedtocatchtheearlybus.A.sheB.thewindC.hershoesD.thestreet17.Thereportwaswrittenclear,concise,andaccurateforallreaderstounderstandeasily.（改错）A.clearB.conciseC.accurateD.understand18.Theteamagreedthattheywouldsplittheprizemoney___themselvesequally.A.betweenB.amongC.withD.for19.Ihavelivedinthistown___Iwastenyearsold.A.sinceB.forC.whenD.while20.Thenewlibrary,openingnextmonth,willoffermoreresourcesthantheoldone.A.NOCHANGEB.openedC.willopenD.opens第二部分ACT数学（精选30题）Directions:Solveeachproblemandchoosethecorrectanswer.Allfiguresaredrawnasaccuratelyaspossibleunlessotherwisenoted.基础代数1.If3x+7=28,whatisthevalueofx?A.5B.7C.9D.112.Simplifytheexpression:4(2x-3)+5xA.13x-12B.8x-12C.9x-3D.12x+123.Whatisthesolutionsetfor2(x-4)≥6?A.x≥1B.x≥5C.x≥7D.x≥104.Ifx=-2andy=3,evaluatex²-2xy+y²A.1B.9C.25D.495.Solvethesystemofequations:2x+y=8,x-y=1A.(3,2)B.(2,3)C.(1,7)D.(4,0)中级代数6.Factorcompletely:x²-9A.(x-3)²B.(x+3)(x-3)C.(x+9)(x-1)D.x(x-9)7.Whatistheslopeofthelinepassingthrough(2,5)and(4,9)?A.1B.2C.3D.48.Thequadraticequationx²-5x+6=0hasrootsof:A.2and3B.-2and-3C.1and6D.-1and-69.Simplify:√48A.4√3B.3√4C.8√6D.12√410.Iff(x)=3x²-2x+1,findf(2)A.9B.11C.13D.15几何11.Arectanglehasalengthof8cmandawidthof5cm.Whatisitsperimeter?A.13cmB.26cmC.40cmD.80cm12.Acirclehasaradiusof6inches.Whatisitsarea?(π≈3.14)A.18.84in²B.37.68in²C.113.04in²D.226.08in²13.Arighttrianglehaslegsof6and8.Whatisthehypotenuselength?A.10B.12C.14D.1614.Thesumofinterioranglesofapentagonis:A.180°B.360°C.540°D.720°15.Acubehasanedgelengthof4.Whatisitstotalsurfacearea?A.16B.48C.64D.96统计与概率、进阶数学16.Whatistheaverageof12,18,24,30?A.21B.22C.23D.2417.Abagcontains4redballsand6blueballs.Whatistheprobabilityofdrawingaredball?A.2/5B.3/5C.1/2D.1/418.If60%ofanumberis48,whatisthenumber?A.70B.80C.90D.10019.Solveforx:5/x=10/14A.5B.7C.9D.1120.Whatis25%of120?A.20B.25C.30D.3521.Simplify(x³)⁴A.x⁷B.x¹²C.x⁻¹D.3x⁴22.Iftwoanglesofatriangleare35°and75°,thethirdangleis:A.70°B.80°C.90°D.100°23.Acartravels180milesin3hours.Whatisitsaveragespeedinmph?A.50B.60C.70D.8024.Findthemedianofthedataset:5,9,3,7,11A.5B.7C.9D.1125.Simplify1/2+3/4-1/8A.5/8B.7/8C.9/8D.11/826.Theliney=4x-3hasay-interceptat:A.(0,-3)B.(4,0)C.(0,4)D.(-3,0)27.Howmanyintegersarebetween-4and5inclusive?A.8B.9C.10D.1128.Iftheratioofboystogirlsinaclassis3:4,andthereare12boys,howmanygirlsarethere?A.14B.16C.18D.2029.Evaluate3³-2⁴A.1B.3C.5D.730.Ashirtpricedat$40isonsalefor15%off.Whatisthesaleprice?A.$32B.$34C.$36D.$38第三部分ACT阅读（短篇真题+10题）Passage:Humanities(ShortFictionExcerpt)Asachild,Lilaspenteverysummerathergrandmother’ssmallcottageontheedgeofaforest.Thecottagehadnomodernelectronics,nofastinternet,andnobusycitynoise.Atfirst,Lilafeltboredandlonely,missingherfriendsandherdailyscreentime.Butastheweekspassed,sheslowlygrewtolovethequietrhythmofsummerdaysinthecountryside.Eachmorning,shewalkedwithhergrandmotherthroughtheforesttopickwildberriesandfreshherbs.Hergrandmothertaughthertotellwhichplantsweresafetotouchandeat,whichbirdssangwhichsongs,andhowtonoticesmallchangesinnature—thewayleavesshiftedcolorbeforeautumn,thewaystreamsflowedfasterafterrain.Intheafternoons,theysatonthewoodenporch,stitchingclothnapkinsandtellingoldfamilystoriesthathadbeenpasseddownforgenerations.Bytheendofeachsummer,Lilareturnedtothecitywithacalmheartandamindfullofnewmemories.Shenolongersawthecottageasaboringplace.Instead,itbecameherfavoriterefuge,aplacewhereshecouldslowdown,observetheworldcarefully,andconnectwithbothnatureandherfamily’shistory.Yearslater,asabusycollegestudentoverwhelmedbyexamsanddeadlines,Lilastillthoughtofthecottageoften.Whenevershefeltstressed,shewouldclosehereyesandrememberthequietforest,thewarmporchsunlight,andhergrandmother’sgentlevoice.Thosesummerlessonstaughtherthatpeacedoesnotcomefromconstantexcitementorbusyschedules,butfromslowingdownandappreciatingthesmall,simplejoysinlife.ReadingQuestions1.Atthebeginningofhersummerstays,Lilafelt:A.peacefulandcontentB.boredandlonelyC.excitedandcuriousD.stressedandanxious2.WhatactivitydidLilaandhergrandmotherdoeverymorning?A.StitchedclothnapkinsB.WalkedintheforesttopickplantsC.ToldfamilystoriesD.Watchedforestbirds3.Accordingtothepassage,thecottagebecamearefugeforLilabecauseit:A.hadmodernconvenientfacilitiesB.allowedhertoslowdownandfindpeaceC.helpedherfinishschoolworkD.lethermeetnewfriendseverysummer4.Theword“rhythm”inparagraph2mostnearlymeans:A.regularpatternB.musicalbeatC.fastspeedD.suddenchange5.WhatmainlessondidLilalearnfromhersummerexperiences?A.CitylifeisbetterthancountrysidelifeB.NatureobservationrequiresprofessionaltrainingC.PeacecomesfromsimplelifeandslowingdownD.Familystoriesaremoreimportantthanstudy6.WhichofthefollowingistrueaboutLila’slatercollegelife?A.SheneverfeltstressedwithstudyB.SherecalledthecottagetorelievestressC.ShemovedbacktothecountrysideD.Sheforgotherchildhoodsummermemories7.Thetoneofthepassageisbestdescribedas:A.criticalB.nostalgicandwarmC.humorousD.formalandstrict8.WhatcanbeinferredaboutLila’sgrandmother?A.ShewasaprofessionalbotanistB.ShevaluednatureandfamilytraditionC.ShedislikedcitylifecompletelyD.SherarelyspenttimewithLila9.Thepassage’smainpurposeisto:A.describeforestplantknowledgeB.explaincollegestudypressureC.shareachildhoodexperienceanditslifelonginfluenceD.comparecityandcountrysidelivingconditions10.WhichdetailsupportstheideathatLila’sfeelingstowardthecottagechanged?A.ThecottagehadnomodernelectronicsB.ShemissedscreentimeatfirstbutlovedtheplacelaterC.ShepickedwildberrieseverymorningD.Shelistenedtohergrandmother’sstories第四部分ACT科学推理（10题，图表实验题型）Passage1:PlantGrowthExperimentAstudentconductedanexperimenttotesthowsunlightdurationaffectsthegrowthofbeanplants.Allbeanplantsweregrowninidenticalsoil,withthesamewateramountandroomtemperature.Theonlyvariablewasdailysunlightexposuretime.Thestudentmeasuredplantheightafter4weeksofgrowth.Table1:PlantGrowthDataGroupDailySunlightHoursAveragePlantHeight(cm)128.22412.53616.84819.451020.1ScienceQuestions1.Whatistheindependentvariableinthisexperiment?A.PlantheightB.DailysunlighthoursC.SoilqualityD.Wateramount2.Whichgrouphadthetallestaverageplantheight?A.Group1B.Group3C.Group4D.Group53.Assunlighthoursincreasefrom2to8hours,plantheight:A.decreasessteadilyB.increasessteadilyC.staysthesameD.increasesthendecreases4.WhatistheapproximateheightdifferencebetweenGroup5andGroup1?A.10cmB.12cmC.14cmD.16cm5.AllofthefollowingwerecontrolledvariablesEXCEPT:A.soiltypeB.watervolumeC.sunlightdurationD.roomtemperaturePassage2:WaterTemperatureandDissolvedOxygenScientistsstudiedtherelationshipbetweenfreshwatertemperatureanddissolvedoxygen(DO)levels,whichiscriticalforfishsurvival.HigherDOlevelssupportmoreaquaticlife.Dataisshownbelow:Temperature10°C→DO=11.2mg/LTemperature15°C→DO=10.1mg/LTemperature20°C→DO=8.9mg/LTemperature25°C→DO=7.8mg/LTemperature30°C→DO=6.5mg/L6.Aswatertemperaturerises,dissolvedoxygenlevel:A.increasesB.decreasesC.remainsunchangedD.fluctuatesrandomly7.Whichtemperaturehasthehighestdissolvedoxygencontent?A.10°CB.20°CC.25°CD.30°C8.Ifwatertemperaturerisesfrom15°Cto30°C,theDOvaluedropsbyapproximately:A.2.6mg/LB.3.6mg/LC.4.6mg/LD.5.6mg/L9.Basedonthedata,whichwaterenvironmentismostsuitableforfish?A.ColdfreshwaterB.WarmfreshwaterC.HotfreshwaterD.Stagnantwater10.Thestudy’smainconclusionisthat:A.WatertemperaturehasnoeffectonDOB.LowerwatertemperaturecorrelateswithhigherDOC.HighertemperatureimproveswaterqualityD.DOlevelsonlychangeinsummer完整详细答案+逐题解析一、ACT英语答案与解析1.答案：B解析：原句为逗号拼接句（两个完整句子用逗号连接，语法错误）。B选项用分号分隔两个独立分句，符合英语语法规范；A语法错误，C句式混乱，D句式累赘。2.答案：A解析：原句前后为并列补充关系，无需添加转折、递进、因果连词，保持原句最流畅。3.答案：B解析：原句存在句式冗余问题，B选项采用平行结构，简洁对称，符合书面表达要求；A重复主语，C标点错误，D为残缺句，无谓语。4.答案：A解析：句中researched、consulted、created为并列过去式动词，描述过去完成的系列动作，时态使用正确。5.答案：D解析：原句为逗号拼接句，D选项修正语病，句式完整通顺；B标点错误，C句式残缺。6.答案：B解析：neither...nor...句型遵循就近原则，靠近谓语的主语为students（复数），谓语用are。7.答案：B解析：whose为关系代词，表所属关系，用于修饰先行词bookstore，指代“书店的窗户”。8.答案：A解析：their为形容词性物主代词，修饰名词campsite；there为地点副词，they’re为theyare缩写，theirs为名词性物主代词，均不可修饰名词。9.答案：B解析：前半句“每日训练”是原因，后半句“轻松夺冠”是结果，therefore表因果关系，符合语境。10.答案：A解析：平行结构要求前后句式一致，均为动名词短语，creatingart与Readingbooks、exploringnature结构统一。11.答案：B解析：虚拟语气，对过去事实的假设，句型为Ifhaddone，主句用wouldhavedone。12.答案：A解析：most后接形容词原形构成最高级，memorable为形容词，修饰名词part；其余选项词性不符。13.答案：B解析：eachof+复数名词作主语，谓语动词用单数形式has。14.答案：C解析：先行词为artifact（物品，非人物），关系代词用which/that，选项中只有which符合。15.答案：A解析：sothat引导目的状语从句，表“为了、以便”，贴合“每日练习只为完美演出”的语境。16.答案：A解析：悬垂分词修正，walking的逻辑主语必须是人，只有she符合逻辑。17.答案：A解析：修饰动词waswritten需用副词clearly，原句clear为形容词，词性错误。18.答案：B解析：among用于三者及以上之间，between用于两者之间，team为多人集体，用among。19.答案：A解析：since+时间点，与现在完成时连用，表“自从……以来”，符合句意。20.答案：A解析：现在分词opening作后置定语，表将来即将发生的动作，修饰newlibrary，语法正确。二、ACT数学答案与解析1.B