2026年部编版四年级英语下册第4单元单词拼写练习

2026年部编版四年级英语下册第4单元单词拼写练习一、单项选择题（总共10题，每题2分，共20分）1.ThenewtextinUnit4mainlyintroduces______inmodernlife.A.traditionalfestivalsandcustomsinChinaB.howtoprotecttheenvironmentandsaveenergyC.thedevelopmentofscienceandtechnologyinthe21stcenturyD.thedailyroutinesofstudentsindifferentcountries解析：本题考查单元主题把握。Unit4focuseson"HowThingsWork"，specificallydiscussingsimplemachinesandtheirapplicationsindailylife.OptionArelatestoUnit2,optionBtoUnit3,optionCtoUnit5,andoptionDtoUnit6.Thecorrectansweralignswiththeunit'scorecontent.2.Inthepassage"SimpleMachinesatHome,"theauthordescribesa______toliftheavyobjectseasily.A.leverB.wheelandaxleC.pulleyD.inclinedplane解析：本题考查单元词汇应用。Thetextexplainshowleversworkbyusingaseesawasanexample.Whilepulleysandinclinedplanesarealsomentioned,theprimaryfocusisonlevers.OptionBandCaresecondarymachinesdiscussed,whileDisincorrectasitdescribesaflatsurface.3.Thesentence"Awheelandaxlehelpscarsmovesmoothly"usestheword______todescribemotion.A.slowlyB.quicklyC.smoothlyD.loudly解析：本题考查单元词汇辨析。Thephrase"movesmoothly"indicatesasmoothmotion,making"smoothly"thecorrectchoice.OptionAandBdescribespeed,whileDisunrelatedtomotion.4.Accordingtothediagramintheworkbook,a______usesaropeandawheeltochangethedirectionofaforce.A.wedgeB.screwC.pulleyD.gear解析：本题考查单元知识理解。Pulleysaredesignedtoliftobjectsbyredirectingforce,asshowninthediagram.Wedgesandscrewsarecuttingorfasteningtools,whilegearsarepartofmechanicalsystemsbutnotpulleys.5.Theunit'sgrammarsectionteachesstudentstouse______todescribehowmachineswork.A.presentsimpletenseB.pastcontinuoustenseC.futureperfecttenseD.presentcontinuoustense解析：本题考查单元语法重点。Theunitemphasizessimplepresenttensefordescribingmachines'functions,asseeninsentenceslike"Alevercanliftheavythings."OptionsB,C,andDarelessrelevanttotheunit'sgrammarfocus.6.Inthestory"TheInventionoftheLightBulb,"ThomasEdison______tomakethebulblastlonger.A.gaveupeasilyB.triedmanytimesC.didnotlikescienceD.workedwithanimals解析：本题考查单元阅读理解。ThepassagehighlightsEdison'sperseverance,mentioninghetestedthousandsofmaterials.OptionBalignswiththetext,whileA,C,andDareincorrectastheycontradictthestory'smessage.7.Theunit'svocabularylistincludestheword"______,"whichmeans"tomakesomethingmove."A.pushB.sitC.sleepD.talk解析：本题考查单元词汇记忆。Theword"push"islistedasaverbrelatedtosimplemachines,asin"Pushtheboxwithawheel."OptionsB,C,andDareunrelatedtomotion.8.Theunit'sprojectasksstudentstodesigna______usingsimplemachines.A.robotB.houseC.machinetoliftbooksD.carwithwings解析：本题考查单元综合应用。Theprojectfocusesonpracticalmachines,likeabook-liftingdeviceusingleversorpulleys.OptionAandDaretoocomplex,whileBisunrelatedtosimplemachines.9.Theunit'sreadingpassagementionsa______tohelppeopleclimbstairseasily.A.ladderB.elevatorC.swingD.slide解析：本题考查单元细节理解。Thepassagediscussesinclinedplanesandhowtheycanbeusedinelevators.Whileladdersandswingsarementioned,theyarenotprimaryexamplesofsimplemachines.10.Theunit'sgrammarexerciseasksstudentstocompletethesentence:"A______isusedtoholdthingstogether."A.nailB.hammerC.screwD.wheel解析：本题考查单元词汇应用.Thetextexplainsthatscrewsarefasteners,asin"Ascrewholdsthetablelegstogether."OptionsAandBaretools,whileDisasimplemachineunrelatedtofastening.二、填空题（总共10题，每题2分，共20分）1.Simplemachinesmakework______andeasier.2.Alevercanliftheavyobjectsbyapplyinga______force.3.Theunit'sprojectrequiresstudentstolabelthepartsofa______.4.Theword"______"means"atoolwithalonghandleandasharppoint."5.Apulleysystemcanchangethe______ofaforce.6.Thestory"TheInventionoftheLightBulb"showsEdison's______tosolveproblems.7.Theunit'sgrammarsectionteacheshowtousetheverb"______"todescribeactions.8.Theword"______"means"tomovesomethingupward."9.Awheelandaxlehelpvehiclesmove______.10.Theunit'sreadingpassageincludesadiagramofa______toliftwaterfromawell.参考答案：1.easier2.smaller3.wheelandaxle4.nail5.direction6.determination7.can8.lift9.smoothly10.pulley解析：11."Easier"completesthesentenceaboutsimplemachines'benefits.12."Smaller"referstotheforceneededwithlevers.13."Wheelandaxle"isakeymachinediscussed.14."Nail"isatoolmentionedintheunit.15."Direction"describespulleyfunction.16."Determination"reflectsEdison'scharacter.17."Can"isusedingrammarexercises.18."Lift"isaverbrelatedtopulleys.19."Smoothly"describeswheelandaxlemotion.20."Pulley"isusedinwell-liftingexamples.三、判断题（总共10题，每题2分，共20分）1.Simplemachinesarealwaysfoundinmoderntechnologybutnotinancienttools.2.Awedgeisatypeofleverthathelpssplitwood.3.Theunit'sreadingpassagementionsthatallmachinesaremadeofsimplemachines.4.Apulleycanonlybeusedtoliftheavyobjects,nottochangeforcedirection.5.Theunit'sgrammarsectionteacheshowtousethepresentcontinuoustenseformachines.6.Thestory"TheInventionoftheLightBulb"showsEdisongivingupafter10attempts.7.Awheelandaxleworktogethertomaketurningeasier.8.Theunit'sprojectasksstudentstodesignamachineusingonlyonesimplemachine.9.Theword"push"ismorecommonthan"pull"whendescribingsimplemachines.10.Theunit'sreadingpassageincludesadiagramofageartoshowhowitworks.参考答案：1.×2.√3.√4.×5.×6.×7.√8.×9.×10.√解析：11.×Simplemachineswereusedinancienttools,likethewheel.12.√Wedgesareatypeoflever,asseeninAxes.13.√Thetextexplainsmachinesarecombinationsofsimplemachines.14.×Pulleyscanchangeforcedirection,notjustlift.15.×Theunitusessimplepresenttense,notcontinuous.16.×Thestoryemphasizeshispersistence,notgivingup.17.√Wheelsandaxlesreduceturningeffort.18.×Theprojectallowsmultiplesimplemachines.19.×"Pull"isequallyimportant,asseeninpulleys.20.√Thediagramincludesgearsintheworkbook.四、简答题（总共8题，每题2分，共16分）1.Explainhowaleverworksandgiveoneexamplefromdailylife.2.Whatisapulley,andhowdoesithelppeople?3.Describethedifferencebetweenawheelandanaxle.4.Whyistheunit'sgrammarsectionimportantforlearningaboutmachines?5.Whatdoesthestory"TheInventionoftheLightBulb"teachstudentsaboutperseverance?6.Howcanstudentsusetheunit'svocabularylisttoimprovetheirwriting?7.Whyisitnecessarytolabelthepartsofamachineintheproject?8.Howdoestheunithelpstudentsunderstandscienceinafunway?参考答案：9.Aleverusesafulcrumtoliftobjectsbyapplyingforceononeside,likeaseesaw.10.Apulleyisawheelwitharope,changingforcedirectiontoliftheavyobjects,likeaflagpole.11.Awheelturnsonanaxle,reducingfrictionforsmoothermovement,likeinabicycle.12.Grammarhelpsdescribemachinefunctionsclearly,usingverbslike"can"and"push."13.ThestoryshowsEdisontestingmanyideasbeforesuccess,teachingnottogiveup.14.Studentscanusewordslike"lever,""pulley,"and"smoothly"towriteaboutmachines.15.Labelingpartshelpsunderstandhowmachinesworkandpreparefortheproject.16.Theunitusesstories,diagrams,andprojectstomakelearningaboutmachinesengaging.解析：17.Theanswerexplainsthelever'smechanismandprovidesarelatableexample.18.Describespulleystructureandfunctionwithareal-worldapplication.19.Differentiateswheelandaxlerolesinmotion.20.Connectsgrammartotechnicalwritingaboutmachines.21.FocusesonEdison'sdeterminationasakeylesson.22.Linksvocabularytowritingskills.23.Explainsprojectpreparationthroughlabeling.24.Highlightstheunit'sinteractiveteachingmethods.五、应用题（总共8题，每题4分，共24分）1.Designasimplemachinetohelpanelderlypersonopenaheavydoor.Includelabelsforparts.2.Writeashortparagraph(5sentences)describinghowawheelandaxleworkinacar.3.Createalistof5simplemachinesfoundinakitchenandexplaintheirfunction.4.Imagineyouareascientist.Writeaparagraph(4sentences)abouthowyouwouldtestanewsimplemachine.5.Rewritethesentence"Apulleymakesliftingheavythingseasier"usingtheword"smoothly."6.Drawadiagramofaleverandlabelthefulcrum,effort,andload.7.Writeasentenceusingtheword"determination"todescribehowEdisoninventedthelightbulb.8.Createashortstory(3sentences)aboutachildusingasimplemachinetohelpafriend.参考答案：9.Machine:Leverwithalonghandleandfulcrumnearthedoor.Labels:Fulcrum,Effortarm,Loadarm.10.Awheelandaxleinacarreducefriction,makingdrivingsmoother.Thewheelturnstheaxle,andtheengineprovidespower.Thiscombinationmakesmovementefficient.11.List:Lever(opensjars),Wheelandaxle(kettlehandle),Inclinedplane(cuttingboard),Wedge(peeler),Screw(canopener).12.Asascientist,Iwouldtestanewsimplemachinebyobservingitsperformance,measuringforceneeded,andcomparingittoexistingmachines.Safetycheckswouldalsobeincluded.13."Apulleymakesliftingheavythingssmoothly."14.Diagram:Fulcrumatthecenter,effortononeside,loadontheother.15.Edison'sdeterminationhelpedhiminventthelightbulbaftermanyfailures.16.Achildusedapulleytohelphisfriendliftaheavybox,makingteamworkeasier.解析：17.Thedesignshowslevermechanics,withlabelsexplainingparts.18.Paragraphexplainswheelandaxlefunctionincars.19.Kitchenexamplesdemonstratesimplemachines'practicaluse.20.Scientistroleemphasizestestingandsafety.21.Sentenceuses"smoothly"todescribepulleybenefit.22.Diagramandlabelsclarifylevercomponents.23.SentencehighlightsEdison'sperseverance.24.Storyshowssimplemachineshelpinginreal-lifescenarios.【标准答案及解析】一、单项选择题1.B2.A3.C4.C5.A6.B7.A8.C9.B10.C解析：同前。二、填空题1.easier2.smaller3.wheelandaxle4.nail5.direction6.determination7.can8.lift9.smoothly10.pulley解析：同前。三、判断题1.×2.√3.√4.×5.×6.×7.√8.×9.×10.√解析：同前。四、简答题1.Aleverusesafulcrumtoliftobjectsbyapplyingforceononeside,likeaseesaw.2.Apulleyisawheelwitharope,changingforcedirectiontoliftheavyobjects,likeaflagpole.3.Awheelturnsonanaxle,reducingfrictionforsmoothermovement,likeinabicycle.4.Grammarhelpsdescribemachinefunctionsclearly,usingverbslike"can"and"push."5