2026年新教材外研版九年级上册英语暑假预习：Unit 5 A Fine Balance语法+写作+考点练习题

第第页2026年新教材外研版九年级上册英语暑假预习：Unit5AFineBalance语法+写作+考点练习题预习航标模块核心目标预习重点预习难点语法​掌握关系代词引导的定语从句，能在环保主题语境中准确选用关系词①先行词判断（人/物/不定代词）；②关系词在从句中的成分（主语/宾语）；③特殊情况：先行词被最高级/序数词/不定代词修饰时只用that区分that与which的用法；关系代词省略的规则写作​能独立完成80-100词的动植物介绍/环保倡议短文，自然融入定语从句按“引入→特征→价值→呼吁”逻辑谋篇；运用单元核心词汇（balance,ecosystem,endangered,protect,survive）；至少嵌入2个定语从句避免内容空泛，用具体事实（如生长环境、保护现状）支撑观点文化意识​理解“人与自然和谐共生”的内涵，感知中国生态保护成果（如麋鹿回归、红树林修复）结合本土生态案例，树立环保意识能用英语表达对生态保护的观点，避免“中式英语”教材全解｜析教材·学新知考点一：语法精讲（定语从句·环保主题适配版）3步判断法（预习必记，自己就能做）步骤操作示例（Themangroveforestthat​protectsthecoastiscalled"greenguardian".）①找先行词被定语从句修饰的名词/代词，紧跟在关系词前先行词是themangroveforest（物）②看属性先行词指人/物/不定代词先行词是“物”③判成分先行词在从句中做主语/宾语/定语先行词在从句中做主语（protects的执行者）核心关系代词用法表（Unit5高频考点）关系代词指代对象从句成分能否省略环保主题例句who/that人主语/宾语作宾语可省Therangerswho​patrolthenaturereserveworkdayandnight.（护林员日夜巡逻自然保护区）which/that物/动物主语/宾语作宾语可省Thebambooforestwhich​providesfoodforpandasisshrinking.（为熊猫提供食物的竹林正在缩减）whose人/物（表所属）定语不可省略Wemustprotectanimalswhose​habitatsarebeingdestroyed.（我们要保护栖息地正遭破坏的动物）that不定代词（all/much/nothing等）主语/宾语作宾语可省Allthat​weneedtodoistoreduceplasticuse.（我们所要做的就是减少塑料使用）必背特殊规则（中考高频失分点）1.只能用that的情况：•先行词被最高级、序数词、theonly/thevery修饰：ThisisthemostsuccessfulwildlifeprotectionprojectthatChinahaseverlaunched.（这是中国启动过的最成功的野生动物保护项目）•先行词是不定代词（all,little,much,nothing等）：Isthereanythingthatwecandotosavetheendangeredbirds?（我们能做些什么拯救这些濒危鸟类吗？）2.只能用which的情况：•定语从句前有逗号（非限制性定语从句）：TheYangtzeRiver,whichisthelongestriverinChina,isfacingpollutionproblems.（长江是中国最长的河流，正面临污染问题）3.省略规则：•关系代词作宾语时可省略：Thepanda(that/which)wesawyesterdayisverycute.（我们昨天看到的那只熊猫很可爱）•关系代词作主语时绝对不能省：Thebirdthatsingsbeautifullyisanightingale.（唱歌好听的鸟是夜莺）•介词提前时不能省：Thewetlandinwhichmanybirdsliveisbeingprotected.（许多鸟类栖息的湿地正得到保护）例题精析（预习自测）Theonlyecosystem______cancleanbothairandwateristheforest.A.whichB.thatC.whoD.whose答案：B解析：先行词被theonly修饰，关系词只能用that，选B。which不能用于被theonly修饰的先行词后，who指人，whose表所属，均不符合。考点二：写作精讲（动植物介绍/环保倡议）写作任务1：介绍一种感兴趣的动植物（单元核心写作要求）写作框架（4段式，逻辑清晰）段落内容要点定语从句运用示例开头（引入）​点明动植物名称+核心地位Thedovetree,whichisalsocalled"Chinesepigeontree",isafirst-classprotectedplantinChina.（珙桐，也叫“中国鸽子树”，是中国一级保护植物）主体1（生长环境）​分布区域、生存条件ItmainlygrowsinthemountainousareasofSichuanandHubei,wheretheclimateiswetandcool.主体2（有趣事实）​外形特征、独特习性、生态价值Itsflowerslooklikewhitedovesperchingonbranches,whichiswhyitgetsitsnickname.结尾（呼吁）​保护现状、发出倡议Wemustprotectthis"livingfossil",whosesurvivaldependsonourefforts.高分句型储备•介绍特征：Thedovetree,whichbloomsinApril,haswhitebractslikedovewings.（珙桐四月开花，苞片洁白如鸽翼）•说明价值：Wetlands,whicharecalled"earth'skidneys",canpurifypollutedwater.（湿地被称为“地球之肾”，能净化污水）•发出呼吁：Let'sprotecttheecosystemsthatalllivingthingsdependon.（让我们保护所有生物赖以生存的生态系统）原创范文（介绍珙桐）TheDoveTree:ALivingFossilThedovetree,whichisknownas"Chinesepigeontree",isoneofmyfavoriteplants.Itisafirst-classnationalprotectedspeciesanda"livingfossil"intheplantworld.Thedovetreemainlygrowsinthecool,wetmountainousareasofSichuanandHubeiprovinces.Itthrivesinplaceswherethesoilisrichandundisturbedbyhumanactivities.Whatmakesitspecialisitsflower:whenitbloomsinApril,thewhitebractsflutterlikedozensofwhitedovesperchingonbranches,whichiswhyitgetsitslovelynickname.Sadly,thedovetreeisendangeredduetodeforestation.Wemustprotectitshabitatsothatthisbeautiful"dove"cankeepflyinginourforests.Itisatreasurethatweshouldpassontofuturegenerations.写作任务2：环保倡议书（单元拓展写作）写作框架段落内容要点高分表达示例开头​点明倡议主题+现状问题Themangroveforest,whichprotectsourcoastfromstorms,isfacingseriousthreatsfrompollution.主体​2-3条具体可行的措施First,weshouldreduceplasticusetopreventmarineanimalsfromeatingtrash.Second,wecanjointree-plantingactivitiestoexpandthewetlandarea.结尾​呼吁参与+展望Let'sworktogethertokeepthebalanceofnature.Smallactionscanmakeabigdifference!即练固基｜趁热打铁练一练（基础巩固，适合预习阶段）一、用合适的关系词（who/whom/whose/which/that）填空1.Therangers______patrolthenaturereserveoftenstayuplatetopreventpoaching.2.Thebamboo______pandasmainlyeatisbecomingscarceduetoclimatechange.3.Thisisthemosteffectivemethod______hasbeenfoundtocleanoilspillsintheocean.4.Weshouldprotectanimals______homesarebeingdestroyedbyhumanactivities.5.All______wecandonowistoraisepublicawarenessofwildlifeprotection.6.Thewetland,______iscalled"earth'skidney",purifiespollutedwaternaturally.7.Thescientist______discoveredanewplantspeciesinYunnanisonly28yearsold.8.Thetrash______wethrowintotheriverharmsfishandotheraquaticanimals.9.Isthereanything______wecandotosavetheendangeredChinesesturgeon?10.Theforest______coverhasdecreasedby10%inthepastdecadeneedsurgentprotection.二、单句合并（用定语从句把两个简单句合成一句）1.Ivisitedthewetlandlastweek.Itishometoover200birdspecies.→_________________________________________________________2.Theofficerisveryresponsible.Heworksinthenaturereserve.→_________________________________________________________3.Weplantedmanytreesyesterday.Theycanabsorbcarbondioxidefromtheair.→_________________________________________________________4.Thedovetreeisa"livingfossil".Itsflowerslooklikewhitedoves.→_________________________________________________________5.Wemustreduceplasticuse.Itisamajorthreattomarineecosystems.→_________________________________________________________三、微写作（3句话即可，用至少1个定语从句介绍一种你喜欢的植物/动物）提示：可以说珙桐、中华秋沙鸭、红树林等，尽量用本单元词汇过关检测｜练考点·强落实（能力提升，贴合中考题型）一、语法填空阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。Theelk(麋鹿),1.______isalsocalled"miludeer",isauniquespecies2.______originatedinChina.Once,itwasonthevergeofextinction.Intheearly20thcentury,therewereonlyabout100elkleftintheworld,mostof3.______livedinforeignzoos.In1985,Chinalaunchedaprogramtoreintroduceelktotheirnativehabitat.TheDafengElkNationalNatureReserveinJiangsu,4.______theclimateandwetlandenvironmentaresuitableforelk,waschosenasthefirstreintroductionsite.Rangers5.______workinthereservehavemadegreateffortstoexpandthewetlandareaandreducehumandisturbance.Now,thenumberofelkinDafenghasgrowntoover7,000,makingitthelargestelkpopulationintheworld.Thisisasuccessstory6.______showsthathumanscanrepairthedamagewehavedonetonature.Theelk,7.______survivalwasonceuncertain,nowroamfreelyinthewetlands.8.______isamazingisthatthereservehasalsobecomehometoover300birdspecies9.______migratehereeverywinter.Weshouldrememberthatalllivingthingsareconnected.Protectingtheelkmeansprotectingtheentireecosystem10.______supportsus.二、完形填空Themangroveforest(红树林)isoneofthemostimportantecosystemsonEarth.Itgrowsalongtropicalandsubtropicalcoasts,1.______itactsasa"greenbarrier"againststormsandtsunamis.Mangroveforestsarehometothousandsofspecies.Fish2.______laytheireggsamongtheroots,andbirds3.______feedonthesefishbuildnestsinthebranches.Therootsofmangrovesalsotrapsediment(沉积物),4.______keepsthewatercleanandpreventscoastalerosion.However,mangroveforestsaredisappearingrapidly.Inthepast50years,wehavelostover30%oftheworld'smangroves,mostlyduetoshrimpfarmingandurbandevelopment.Thisnotonlydestroysthehabitatsofwildlifebutalsomakescoastalcommunitiesmorevulnerabletonaturaldisasters.InChina,effortstorestoremangroveshaveachievedgreatsuccess.InShenzhen,theFutianMangroveNatureReservehasbeenexpanded,andthenumberofmigratorybirds5.______visiteachyearhasincreasedby40%.Volunteers6.______jointherestorationprojectsoftenplantyoungmangrovetreesandcleanuptrash.Localgovernmentshavealsomadelaws7.______forbidcuttingdownmangroves.Theseeffortsshowthatwecanreverse(扭转)thedamage.Themangroveforest,8.______wasonceignored,isnowrecognizedasavitalpartoftheecosystem.Wemustcontinuetoprotectit,notjustfortheanimals9.______livethere,butforourselves.Afterall,ahealthyplanetistheonlyhome10.______wehave.1.A.whereB.whichC.whoD.whom2.A.whoB.thatC.whoseD.whom3.A.whoB.whichC.whereD.what4.A.thatB.whoC.whereD.what5.A.whoB.whichC.whereD.what6.A.whoB.whichC.whoseD.where7.A.thatB.whoC.whoseD.whom8.A.thatB.whichC.whereD.when9.A.whoB.whichC.whereD.when10.A.thatB.whichC.whereD.when三、阅读理解TheReturnoftheMiluDeerThemiludeer,orelk,isauniquespeciesnativetoChina.Ithasastrangeappearance:anecklikeacamel,antlerslikeadeer,hooveslikeacow,andataillikeadonkey,whichiswhyitisalsocalled"sibuxiang"(four-unlike)inChinese.Forcenturies,itwasasymbolofgoodluckandwaskeptinroyalhuntinggrounds.However,bytheearly20thcentury,themiludeerhaddisappearedfromChinaduetowarsandhabitatloss.TheonlyremainingmiludeerlivedinWoburnAbbeyintheUK,wheretheDukeofBedfordhadcollected18ofthemin1900.In1985,ChinabegannegotiationswiththeUKtoreintroducethemiludeer.Thefirstbatchof22elkarrivedinBeijingthatyear,andmorefollowedinthenextfewyears.TheDafengElkNationalNatureReserveinJiangsuProvince,whichhasvastwetlandssuitableforelk,wasestablishedastheirmainhabitat.Today,theDafengreserveishometoover7,000miludeer,thelargestpopulationintheworld.Thespecieshasbeendowngradedfrom"endangered"to"nearthreatened"ontheIUCNRedList.Thissuccessisduetothehardworkofrangers,scientists,andlocalcommunitieswhohaveprotectedthewetlandsandreducedhumandisturbance.ThereturnofthemiludeerisatestamenttoChina'scommitmenttoecologicalprotection.Itshowsthatwitheffort,wecanrestorebalancetonatureandsavespeciesfromextinction.1.Whyisthemiludeercalled"sibuxiang"inChinese?A.Becauseitisveryrare.B.Becauseithasfeaturesoffourdifferentanimals.C.Becauseitisasymbolofgoodluck.D.BecauseitdisappearedfromChinaforalongtime.2.Whereweretheonlyremainingmiludeerintheearly20thcentury?A.InBeijing'sroyalhuntinggrounds.B.InWoburnAbbeyintheUK.C.InDafengNatureReserve.D.InthewetlandsofJiangsu.3.WhendidthefirstbatchofmiludeerreturntoChina?A.In1900.B.In1985.C.Intheearly20thcentury.D.Today.4.Whatisthemainreasonforthesuccessofthemiludeerreintroductionprogram?A.TheDukeofBedford'scollection.B.TheestablishmentofDafengNatureReserve.C.Thehardworkofpeopleprotectingthewetlands.D.Thereductionofhumandisturbance.5.Whatisthemainideaofthepassage?A.Themiludeerisauniquespecieswithastrangeappearance.B.ThemiludeerdisappearedfromChinaduetowarsandhabitatloss.C.ThereturnofthemiludeershowsChina'ssuccessinecologicalprotection.D.TheDafengElkNationalNatureReserveisthelargestintheworld.四、书面表达假设你是李华，你校英语社团正在举办“守护蓝色海岸”主题活动，请你写一篇80-100词的倡议书，呼吁同学们保护红树林。提示：1.红树林的重要性：抵御风暴、为鸟类提供栖息地、净化海水；2.面临的威胁：围垦养殖、垃圾污染、乱砍滥伐；3.我们可以做的行动：不随手扔垃圾、参加红树林种植活动、宣传保护知识。参考词汇：mangroveforest红树林，storm风暴，habitat栖息地，purify净化Dearfellowstudents,_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Let'sworktogethertoprotectourbluecoast!LiHua参考答案及解析即练固基一、1.who/that2.which/that3.that4.whose5.that6.which7.who/that8.which/that9.that10.whose二、1.Ivisitedthewetlandlastweek,whichishometoover200birdspecies.2.Theofficerwho/thatworksinthenaturereserveisveryresponsible.3.Weplantedmanytreesyesterday,which/thatcanabsorbcarbondioxidefromtheair.4.Thedovetree,whoseflowerslooklikewhitedoves,isa"livingfossil".5.Wemustreduceplasticuse,whichisamajorthreattomarineecosystems.三、示例：Myfavoriteplantisthemangrovetree,whichgrowsalongthecoast.Itcanprotecttheshorefromstormsandprovideasafehomeforsmallfish.Weshouldprotectittoke