Unit 13 We're trying to save the earth!重点知识点讲解练习人教版英语九年级全册

Unit13Wearetryingtosavetheearth!一、重点单词1、litterv.乱扔｜｜n.垃圾；废弃物v.使遍布2、bottomn．底部；最下部3、advantagen．优点；有利条件4、costv.（cost，cost）花费｜｜n.花费；价钱考n.成本；代价5、harmfuladj.有害的6、takepartin参加7、affordv.承担得起（后果）；买得起8、payfor付费；付出代价9、takeaction采取行动10、recyclev.回收利用；再利用11、throwaway扔掉；抛弃12、pull...down拆下；摧毁13、upsidedown上下颠倒；倒转14、presidentn.负责人；主席；总统二、重点短语1.stopthesaleofsharkfins阻止鱼翅交易2.sofar到目前为止3.scientificstudies.科学研究4.beindanger处于危险中5.affordtodo承担的起6.takeaction采取行动7.beginwith从...开始8.takepartin参加9.addup加起来，总计10.payfor为...付款11.recyclebooksandpaper循环利用书籍和纸张12.turnoff关闭13.usepapernapkins用纸巾14.throwaway扔掉，抛弃15.putsthtogooduse好好利用某物16.haveacreativemind有一个创新思维17.amostunusualwoman一个很不寻常的妇女18.build/makesth.herselfoutofrubbish她自己用垃圾建造19.pulldown拆下，摧毁20.turnupsidedown上下颠倒过来，倒转21.bemadeof由...做成22.aninspirationtosb.对某人是个鼓舞23.begoodatrecycling擅长循环利用24.usesth.todo用某物去做什么25.setupawebsite.创建网站26.setupasmallbusiness开一家小公司27.sellthemonline网上卖他们28.plantodo计划做29.writeabookabout写一本关于...的书30.newwaystodosth.干什么的新办法三、重点知识点讲解1、littern.垃圾v.乱扔2、cutdown削减；砍倒3、costv.&n.花费4、notonly...butalso...不但……而且……5、takepartin参加6、Everyoneinthistownshouldplayapartincleaningitup!7、Thereareotheradvantagesofbikeriding.8、Sotogether,ouractionscanmakeadifferenceandleadtoabetterfuture!9、Iftheirnumbersdroptoolow,itwillbringdangertoalloceanlife.10、Sofar,noscientificstudieshaveshownthatsharkfinsaregoodforhealth,sowhyeatthem?讲解版1、littern.垃圾v.乱扔1、litter作名词相当于rubbish，是不可数名词。2、litter作动词用意为＂乱扔＂。2、cutdown削减；砍倒cutdown意为＂减少＂cutdown 砍倒；减少cutoff 切掉cutout 删除cutup 切碎3、costv.&n.花费cost作动词时，常用于Sthcost(s)sbsomemoney.【辨析】take/spend/cost/pay1、spend的主语必须是人①spendtime/moneyonsth在……上花费时间(金钱)②spendtime/money(in)doingsth花费时间(金钱)做某事2、cost的主语是物或某种活动，还可以表示＂值＂①sthcosts(sb)＋金钱某物花了(某人)多少钱②(doing)sthcosts(sb)＋时间某物(做某事)花了(某人)多少时间3、take后面常跟双宾语①Ittakessb.＋时间＋todosth.做某事花了某人多少时间②doingsth.takessb.＋时间做某事花了某人多少时间4、pay的基本用法是：①pay(sb)moneyforsth付钱(给某人)买…… ②payforsth付……的钱③payforsb替某人付钱 ④paysb付钱给某人⑤paymoneyback还钱4、notonly...butalso...不但……而且……notonly...butalso...意为＂不但……而且……＂，其中also可以省略。连接并列主语时，句子的谓语动词应与butalso后的主语的人称和数保持一致。either...or...意为＂或者……或者……，不是……就是……＂，当其连接并列主语时，谓语动词要和最近的主语保持人称和数的一致。both...and...意为＂……和……都＂，当其连接并列主语时，谓语动词要用复数形式。5、takepartin参加【辨析】takepartin/join/joinin/attendtakepartin 指参加会议或群众性活动等，重点说明句子的主语参加该项活动，并在其中发挥作用。join 指加入某个党派、团体、组织等，如＂参军、入团、入党＂等。joinin 指参加某种活动，如＂游戏＂等，joininsth意为＂参加某事＂。attend 侧重参加或出席会议、学术活动、音乐会、上课等，着重强调成为其中的听众或观众。6、Everyoneinthistownshouldplayapartincleaningitup!playapartin...的意思是＂在……起作用＂，相当于playarolein...。7、Thereareotheradvantagesofbikeriding.advantage的意思是＂优点；有利条件＂，反义词是disadvantage，意思是＂缺点，不利条件＂。havetheadvantageof胜过……8、Sotogether,ouractionscanmakeadifferenceandleadtoabetterfuture!makeadifference的意思是＂有重大的影响＂；leadto的意思是＂导致，引导＂。9、Iftheirnumbersdroptoolow,itwillbringdangertoalloceanlife.if引导的是条件状语从句，谓语动词使用一般现在时表示将来，主句使用一般将来时。10、Sofar,noscientificstudieshaveshownthatsharkfinsaregoodforhealth,sowhyeatthem?1、sofar的意思是＂到目前为止＂，主句时态使用现在完成时。2、句中that引导的是宾语从句，作动词shown的宾语。begoodfor的意思是＂对……有好处＂。练习一、单选题1．Thereis________advantageofthismachine.Itcansavemuchelectricity.A．an B．a C．the D．/2．Itis________ofyoutokillcatsanddogs.Theyareourfriends.A．cruel B．nice C．good D．reusable3．Sharksareatthetopofthefoodchain,________iftheirnumbersdrop,theocean’secosystemwillbeindanger.A．when B．although C．so D．but4．Don’ttalkina________voice.Wecan’thearyouclearly.A．tall B．short C．high D．low5．Hehopestosetup________“metalart”themeparktoshowpeopletheimportanceofenvironmentalprotection.A．a B．an C．the D．/6．—Thedressisverynice.I’lltakeit.—Butyou’dbetter________first.Ithinkit’salittlelargeforyou.A．payforit B．putiton C．putitoff D．tryiton7．Whenmymothercameintomyroom,Iwasjustlyinginbedandwaitingforthealarmto________.A．putoff B．takeoff C．turnoff D．gooff8.TomorrowisEarthDay.Let’sdiscuss_________.A．whenshallwegiveouttheleaflets B．whatwecandotorecyclethingsC．howshouldwesavemoreenergy D．whethercanwemakeourcitygreener9．Jim,you’dbetternot________toomuchtimeonyourmobilephone.A．cost B．spend C．take D．pay10．TheTokyoOlympicswillbeheldfromJuly23toAug8.Chineseathletes（运动员）will________155events.A．takepartin B．takecareof C．takepridein D．payattentionto二、用所给词的适当形式填空1.Look!Somevolunteers______________(clean)upthepark.2.Hisfatherusedto___________(stay)athome,butnowheisusedto______(take)awalkafterdinner.3.Mobilephonesmustn’t______________(bring)totheclassroominourschool.4.AtalkonhowtolearnEnglish_____________(give)intheschoolhall.I’mlookingforwardtoit.5.QianXuesen______________(consider)as“FatherofMissile(导弹)inChina”6．Thistoywillhelpchildrenwiththeir_________(create)7．Somedayyouwillcometorealizethe_________ofEnglish.(important)8．Ithinkwe_________prettywellsofar.(do)9．Whatdoyouthinkofthe_____________pollution？(environment)10．StudyingEnglishhasmany_________．(advantage)三、根据汉语提示完成句子1．工人们正在竭尽全力降低事故率。Theworkersaredoingalltheycan________________________theaccidentrate.2．我的家乡的天空过去常常是蓝色的。Theskyinmyhometown________________________blue.3．我们的行动会使它变得不同，并通向更好的未来。Ouractioncan________________________andleadtoabetterfuture.4．旧的楼房已经被拆除了。Theoldbuildings____________________________________.5．我们很高兴看到我们的城市在过去的几年里变得越来越美丽。Wearehappytoseeourcity________________moreandmorebeautifulinthe____________________．6.这个房间里将有一个聚会,请在聚会后把房间打扫干净。Therewillbeapartyinthisroom.Pleaseitaftertheparty.7.树对我们是有用的,当我们砍倒一些时,应该栽更多。Treesareveryusefultous.Weshouldplantmorewhenwesome.8.这条裙子花了我60美元。Thedress$60.9.我们的行动会带来不同,并引领一个更好的未来。Ouractionscanandleadtoabetterfuture.10.这条河被严重污染了。Theriver.四、阅读回答问题GlobalWarmingSatterlivesinBonnotola(BT)insouthwesternBangladesh(孟加拉国).Thesmallseasidevillagewasoncehometo2,000people.Mostofthemwerefarmers,likeSatter.Butrisingseaspoisoned(毒化)thesoilwithsaltwater.Twomajorstormsinthelasttwoyearsdestroyedthemudbarriers(土坝)thatprotectedthevillagefromthesea.Today,only480peopleremain.“TheeffectsofglobalwarmingaredestroyingpartsofBangladesh,”saidMohammadwhoistheheadoftheresearchcenterPRD．Saltinsoilhasincreasedby26percentoverthepast35years.In1973,833,000hectaresoflandwerepoisonedbyseawater.Areasoffreshwaterwerealsopoisoned.Thisgrewto1.02millionhectaresin2000,and1.056millionhectaresin2009,reportsBangladesh’sSRDI.AtBTvillage,thewomenwalkupto4kilometerstoawelltocollectwaterforcookinganddrinkingeveryday.Wellsintheareaonlyhavefreshwaterinthemonthsafteryearlyheavyrains.Inthesummer,freshwaterisdifficulttofind,saidoneofthewomen,Halder.ThevillageslieinBangladesh’ssouthwesternShyamnagararea.Theareaishometo400,000people.Officialssaythegovernmentdoesnothavethemoneytobuilddesalinationfactories.“Theareaneedsmaybe500desalinationfactories.Butwe’veonlygot50,”saidAlamgirheadofalocalorganization.TheUnitedNationsmadeareportthatwarnedglobalwarmingwouldgetworseinthecomingyearsevenifhumansimmediatelystoppedproducingcarbongas.AftertheUNreport,thequestionremains:Willworldleaderschoosetoprotecttheenvironment?Nomatterwhattheworldleadersdo,therearealotofwaysindividual(个体)peoplecanmakechoicestoprotecttheenvironment.Peoplecanchangewhattheye