2026学年八年级英语下册第七单元核心考点单元练习含答案及解析

2026学年八年级英语下册第七单元核心考点单元练习含答案及解析考试时长：120分钟满分：100分班级：__________姓名：__________学号：__________得分：__________一、单选题（总共10题，每题2分，总分20分）1.Whatdoes"sustainabledevelopment"meanaccordingtotheunit?A.RapideconomicgrowthatanycostB.ProtectingtheenvironmentwhilemeetinghumanneedsC.ReducingindustrialproductiontosaveenergyD.Encouragingmorepeopletousepublictransportation2.WhichofthefollowingisNOTatypicalproblemmentionedinUnit7?A.AirpollutionincitiesB.WaterscarcityindesertsC.DeforestationintropicalrainforestsD.Noisepollutionfromconstructionsites3.Thephrase"takeaction"intheunitisclosestto:A.DonothingandwaitB.StartdoingsomethingimmediatelyC.TalkaboutproblemsbutnotsolvethemD.Ignoresmallissuesandfocusonbigones4.Whatisthemainideaofthepassage"TheGreatBarrierReef"?A.ThehistoryoftheGreatBarrierReefB.HowtoswimintheGreatBarrierReefC.ThethreatstotheGreatBarrierReefandsolutionsD.ThetypesoffishintheGreatBarrierReef5.Whichsentenceusesthecorrectformof"should"toexpressadvice?A.Weshouldtoprotecttheenvironment.B.Theyshouldnotmaketoomuchnoise.C.Heshouldnotgotoschoolyesterday.D.Youshouldnotrecyclingplasticbottles.6.Whatdoes"carbonfootprint"refertointheunit?A.Thesizeofaperson'sfeetB.TheamountofcarbonreleasedbyhumanactivitiesC.TheweightofcarbonintheatmosphereD.Thedistancecarbontravels7.Whichverbiscorrectlyusedinthesentence"Wemustreducewastetohelptheplanet"?A.ReduceB.ReducingC.ReducedD.Reduces8.Whatisthepurposeofthearticle"HowtoSaveEnergyatHome"?A.Tosellenergy-savingproductsB.ToexplainwhyenergyisimportantC.TogivetipsonsavingenergyindailylifeD.Tocomparedifferenttypesofenergy9.Theword"threatened"intheunitmeans:A.ProtectedB.DamagedC.SupportedD.Encouraged10.Whichsentenceshowsthecorrectuseof"too"and"either"?A.Helikescoffee,too.B.Shedoesn’tliketea,too.C.Theyarelate,either.D.Youshouldstudy,either.二、填空题（总共10题，每题2分，总分20分）1.Weneedto_______(protect)theoceansfrompollution.2.Thegovernmentshould_______(limit)theuseofsingle-useplastics.3.Ifwe_______(continue)tocutdowntrees,animalswilllosetheirhomes.4.It’simportantto_______(save)watereveryday.5.Manypeople_______(believe)thatclimatechangeisaseriousproblem.6.We_______(should)plantmoretreestoreduceairpollution.7.TheGreatBarrierReefis_______(threaten)byrisingseatemperatures.8.Scientistsaretryingtofindwaysto_______(protect)endangeredspecies.9.Ifeveryone_______(recycle),theenvironmentwouldbebetter.10.We_______(must)takeactionbeforeit’stoolate.三、判断题（总共10题，每题2分，总分20分）1.Sustainabledevelopmentmeansbalancingeconomicgrowthwithenvironmentalprotection.(正确)2.Usingpublictransportationalwaysreducesaperson’scarbonfootprint.(正确)3.It’sokaytoignoresmallenvironmentalproblemsbecausetheyarenotserious.(错误)4.Deforestationhasnoimpactonglobalclimatechange.(错误)5.TheGreatBarrierReefislocatedintheAtlanticOcean.(错误)6.Recyclingpaperhelpssaveenergyandreducepollution.(正确)7."Should"isusedtogivesuggestionsoradvice.(正确)8.Acarbonfootprintmeasurestheamountofwasteapersonproduces.(错误)9.It’sunnecessarytoreducewaterusageathome.(错误)10."Either"isusedwithnegativesentences.(正确)四、简答题（总共4题，每题4分，总分16分）1.Whatarethreewaysstudentscanhelpprotecttheenvironmentatschool?(至少写出三点，如：turnofflights,reducepaperuse,recyclewaste)2.Explainthemeaningof"carbonfootprint"inyourownwords.(答案应包含个人活动与碳排放的关系，如：carbonfootprintistheamountofcarbondioxidereleasedbyourdailyactivities)3.WhyistheGreatBarrierReefimportanttotheecosystem?(答案应提及生物多样性、海洋生态平衡等，如：itsupportsmanyspeciesandhelpsmaintainoceanhealth)4.Howcanpeoplereducetheirwaterusageathome?(答案应包含具体方法，如：takeshortershowers,fixleaks,usewater-efficientappliances)五、应用题（总共4题，每题6分，总分24分）1.Supposeyouarewritingashortparagraphaboutprotectinglocalforests.Writeatleastfivesentencesusing"should,""must,"and"can."(示例：Weshouldplantmoretrees.Wemustreducedeforestation.Wecanrecyclepaper.Protectingforestsisimportant.Everyonecanhelp.)2.Imagineyouareastudent.Writealettertoyourschoolprincipalsuggestingthreewaystosaveenergy.Useatleasttwo"too"andtwo"either"sentences.(示例：DearPrincipal,Ithinkweshouldturnofflightswhenleavingrooms.Weshouldalsouseenergy-efficientbulbs.It’stooimportanttosaveenergy.Ifeveryonedoestheirpart,eithertheschoolortheplanetwillbenefit.Thankyou.)3.Readthefollowingsituationandanswerthequestion:Alocalparkisbecomingpollutedbecausepeoplethrowtrasheverywhere.Writeashortparagraphgivingadviceonhowtosolvethisproblem.Useatleastone"either"andone"too"sentence.(示例：Weshouldcleanuptheparkeveryweek.Peoplemustnotthrowlitter.Ifweworktogether,eithertheparkortheenvironmentwillimprove.It’stoolateifwedon’tactnow.)4.Youareorganizinganeco-friendlyeventatyourschool.Writeashortannouncementusingatleastthree"should"andone"must"sentence.(示例：Attentioneveryone!Weshouldbringreusablecups.Wemustavoidsingle-useplastics.Ifyouwanttohelp,eitherjoinusorspreadtheword.Protectingtheplanetistooimportanttoignore.)【标准答案及解析】一、单选题1.B解析：Sustainabledevelopmentmeansbalancingeconomicgrowthwithenvironmentalprotection,asstatedintheunit.2.B解析：WaterscarcityindesertsisnotatypicalproblemdiscussedinUnit7,whichfocusesonurbanandmarineenvironments.3.B解析："Takeaction"meansstartingtodosomethingimmediatelytosolveaproblem.4.C解析：ThepassageabouttheGreatBarrierReefexplainsitsthreatsandsolutions,whichisthemainidea.5.B解析："Shouldnotmaketoomuchnoise"isgrammaticallycorrect.6.B解析：Carbonfootprintreferstotheamountofcarbonreleasedbyhumanactivities.7.A解析："Reduce"isthecorrectformoftheverbinthesentence.8.C解析："HowtoSaveEnergyatHome"givespracticaltips,matchingthearticle’spurpose.9.B解析："Threatened"meansdamagedorindanger,asusedintheunit.10.A解析："Helikescoffee,too"isthecorrectuseof"too."二、填空题1.protect解析：Protectingmeanspreventingharmtotheenvironment.2.limit解析：Limitingreducesexcessiveuseofplastics.3.continue解析：Continuetocuttreesimpliesongoingactions.4.save解析：Savewatermeansusinglesswater.5.believe解析：Believeshowspeople’sopinionsonclimatechange.6.should解析：Shouldisusedforadvice.7.threatened解析：Threateneddescribesthereef’sdanger.8.protect解析：Protectinghelpsendangeredspeciessurvive.9.recycle解析：Recyclereduceswaste.10.must解析：Mustexpressesstrongnecessity.三、判断题1.正确解析：Theunitdefinessustainabledevelopmentasbalancinggrowthandenvironment.2.正确解析：Publictransportationreducescarbonemissions.3.错误解析：Smallproblemscanleadtobiggerissues.4.错误解析：Deforestationaffectsclimatechange.5.错误解析：TheGreatBarrierReefisinthePacificOcean.6.正确解析：Recyclingpapersavesenergy.7.正确解析："Should"givesadvice.8.错误解析：Carbonfootprintmeasurescarbonemissions,notwaste.9.错误解析：Reducingwaterusagehelpstheenvironment.10.正确解析："Either"isusedwithnegativesentences.四、简答题1.-Turnofflightswhennotinuse.-Usebothsidesofpaper.-Recyclewasteproperly.2.Carbonfootprintmeasureshowmuchcarbondioxideisreleasedbyouractivities,suchasdriving,eating,orusingelectricity.3.TheGreatBarrierReefisimportant