2020版高考英语一轮复习Book8Unit22EnvironmentalProtection教案（含解析）北师大版.docx

Unit 22 Environmental Protection基础知识默写(学生用书325328页)默写(一)1.trapvt.使困住n.陷阱；圈套2.reserven.保护区v.保护；保留；预订reservationn.保护；保留；预订reservedadj.预订的，保留的3.principlen.原则，道德准则4.beyondprep.超出5.relevantadj.有关的relevantlyadv.有关地；得要领地relevancen.相关6.referv.指，意即referencen.提到，谈及；参考，查阅7.agriculturen.农业agriculturaladj.农业的；农艺的8.recyclevt.回收利用9.threatenvt.威胁threatn.威胁10.conservationn.保护conservevt.保护；保存11.coincidencen.巧合12.condemnvt.迫使(某人)陷入不幸的境地；谴责13.sacrificevt.&vi.牺牲；献出14.advocatevt.主张，提倡15.slidevi.&vt.(使)滑行；(使)滑动16.substituten.代替品，代用品v.(用)代替17.behalfn.代表18.changeableadj.多变的changev.&n.改变19.anumberof一些，许多20.inturn依次；轮流；反过来，转而21.leadto导致；通向；引起22.takeaction采取行动23.aheadof在前面24.apartfrom除以外25.answerfor对负责26.orelse否则，不然27.wrapup结束；席卷而去；包起来28.Inthelastfewdecades，scientistshavereachedconsensusandreportedthathumanbeingsarecausingchangesintheEarthsclimate.在过去的几十年里，科学家们一致认为，人类正在造成地球气候的变化29.Withoutthesenaturallyoccurringgases，thesunsrayswouldbouncebackintospaceleavingtheEarthcoldandimpossibletoliveon.如果没有这些自然产生的气体，太阳的光线将会被反射回太空中去，那么地球将处于寒冷之中，从而使生物不可能在地球上存活。30.Giventhisdata，itseemsthatthelinkbetweenhumanactivitiesandrisingglobaltemperaturesisnotmerelyacoincidence.鉴于这些数据，似乎人类活动与正在升高的全球温度之间的关联并不仅仅是巧合。默写(二)1.seizevt.依法没收；(用武力)夺取2.armvt.武装3.roughadj.艰难的；粗糙的roughlyadv.粗糙地；概略地4.separationn.分离，分开separateadj.分开的v.分离，分开5.meansn.方法6.constructvt.建造constructionn.建造7.adoptvt.采用；收养adoptionn.采用；收养8.politicsn.政治(活动)politicaladj.政治的politiciann.政治家9.mountainousadj.多山的10.fleevi.&vt.逃走11.potentialn.可能性；潜在性potentiallyadv.潜在地；可能地12.considerateadj.想得周到的，体贴的considervt.考虑considerationn.考虑13.financen.资金financialadj.财务的；金融的14.allocatevt.分配，配给allocationn.分配，配给15.fragileadj.易毁的；脆弱的16.sharpenvt.削尖sharpadj.尖的，锋利的sharpenern.卷笔刀17.validadj.有充分理由的；有效的；合法的validlyadv.合法地；正当地18.calculatevt.计算，算出calculationn.计算calculatorn.计算器19.ononesbehalf代表20.forgood永远21.carryoff掠走，夺走22.allinall总的来说23.resultin导致24.earnones/aliving谋生25.allthebest祝一切顺利26.sumup总结，概括27.asamatteroffact实际上28.breakawayfrom摆脱，脱离(某种思想体系、团体、组织)29.Thelastfewyearshaveseenenvironmentaldisastersonagrandscale，andexpertsarepredictingfarworsetocome.在过去的几年里，人们已经经历了大规模的环境灾难，专家们预测更为严重的灾难即将来临。30.TherehasbeenterriblefloodinginAsia，Africa，AmericaandOceania.亚洲、非洲、美洲和大洋洲都发生过可怕的洪涝灾害。基础知识夯实.语境填词1.Ifyoudontpayyourdebt，yourpropertywillbeseized(没收).2.Someminersweretrapped(使困住) undergroundafterthecollapse.3.Formostpeople，thecarisstilltheirmainmeans(方式) oftransport.4.Itspartlythathiswritingsrodeawaveofsocial，political(politics) andscientificprogress.(2018浙江)5.Theschoolsmustadopt(adoption) newmethodsofteachingforeignlanguages.6.Smallcolorchoicesbringwiththemthesignificantbenefitofbeingeasilychangeable(change).(2018全国)7.Beingagoodneighborismoreorlessaboutconsiderate(consider) behavior.(2018浙江)8.Thenumberoftheunemployedisontheriseowingtothefinancial(finance) crisis.9.Therearehugeamountsofreference(refer) bookswhichIamoftenconfusedtochoosefrom.(2018江苏)10.Touristsarerequiredtomakereservations(reserve) inadvance.11.Thelossofglaciers(冰川) thereduetoglobalwarmingrepresentsanenormousthreat(threaten) toagriculture.12.Thetriptheytookmeonwasarough(roughly) one.(2017全国)13.From2004to2013，agricultural(agriculture) landvaluesdoubled，andtheycontinuetoriseinmanyregions.(2018江苏)14.Itsdifficulttopickupradioprogramsinthemountainous(mountain) areas.15.Apencilsharpenerisadevicethatcanbeusedtosharpenapencil.(sharp).选词成篇Humanshavedamagedtheenvironmentin1.anumberofaspects，urnhasinfluencedourlife.Besidesthis，itis3.beyondourcontrol.Ithinkwehumansshouldberesponsibleforit.4.Lookingahead，itistimeforusto5.takeaction；6.orelse，itwould7.resultingreaterdamage.Withmoreandmorefactoriesbuiltinmyhometown，alotofagriculturallandhasbeen8.carriedoff，whichhas9.ledtoariseinproductprices.10.Apartfromthis，theairandrivershavebeenheavilypolluted.Obviously，thefactoriesshould11.answerfortheconsequences.So12.onbehalfofthevillagersbenefit，thelocalgovernmenthasdecidedto13.callforanendtothefactoriesillegalbehaviors.完成句子1.Since2011，thecountryhasgrownmorecornthanrice.(完成时)(2018全国)自2011年以来，这个国家种的玉米比水稻多。2.Withoutrules，oursocietywouldbeinchaos.没有规则，我们的社会将处于混乱中。3.Givenhisage，hediditquitewell.(过去分词作条件状语)考虑到他的年龄，他做得相当好。4.HistoryhaswitnessedtheendlessproductionsofShakespeareanplaysineverymajorlanguageoftheworld.(用拟人的修辞手法)历史见证了莎士比亚戏剧在世界各种语言中无尽的演出。5.Languageshavebeencomingandgoingforthousandsofyears，butinrecenttimestherehasbeenlesscomingandalotmoregoing.(therebe句型)(2018全国)语言的出现和消失已经有几千年的历史了，但最近出现的语言越来越少，消失的越来越多。1.“各行各业”的名词(1)agriculture农业(2)industry工业(3)business商业(4)fishing渔业2.“主张、建议和要求”动词集锦advocate，insist，suggest，advise，propose，ask，demand，require，request3.与“环境”有关的词汇(1)speciesn.物种(2)reserven.保护区(3)atmospheren.大气层(4)conservationn.保护(5)recyclev.回收利用(6)ecologyn.生态(学)4.“实际上”短语大全(1)asamatteroffact(2)infact(3)intruth(4)inreality(5)ineffect5.“负责”短语全接触(1)answerfor(2)beresponsiblefor(3)takeresponsibilityfor(4)inchargeof6.“许多，大量”词汇扫描(1)修饰不可数名词：much，agreatdealof，agoodamountof，largeamountsof(2)修饰可数名词：anumberof，afew，manya(3)既可修饰可数名词，又可修饰不可数名词：lotsof，plentyof，alargequantityof，largequantitiesoftrapn.夹子；陷阱；圈套；困境v.使困住，使陷于；使落网(1)set/lay a trap给设圈套(2)trap sb. into doing.诱骗某人做(不说trap sb. to do.)(1)I was trapped into telling the police all I knew.(2)He will fight even more desperately if trapped(trap).句式升级(3)Hewastrappedinatrafficjam，sohehadtobepatient，waiting.(用过去分词短语作状语改写)Trappedinatrafficjam，hehadtobepatient，waiting.reservev.贮备；保留；预订n.储备；贮藏；保护区(1)reserve sth. for.为保留某物in reserve备用(2)reservation n.预订；保留意见without reservation毫无保留地make a reservation预订，预约(1)Beijingwasonceacityofbikes，knownastheBicycleKingdom，wherecarswerereserved(reserve) forofficialbusinessandthepoliticallypowerful.(2)Franklyspeaking，Ihavelittlemoneyinreserve(备用).(3)Irecommendhimwithoutreservation(毫无保留地)，asIbelieveyouwillappreciatehisabilityinhisstudies.beyondprep.超出；除之外；在(或向)较远的一边；晚于，迟于；非所能及adv.在另一边；在(或向)更远处beyond sb. 为某人所不能理解；超出某人的能力beyond control/belief/doubt无法控制/无法相信/毫无疑问beyond description无法描述beyond comprehension不可思议；令人费解beyond ones reach够不着；高不可攀beyond ones power是某人所不能及的beyond compare无与伦比；非常好写出下列句子中beyond的汉语意思(1)Theroadcontinuesbeyondthevillageupintothehills.在(或向)较远的一边(2)Someshopskeepopenbeyondmidnight.晚于(3)Thisproblemisfarbeyondmycomprehension.非所能及(4)Iknownothingofitbeyondwhathetoldme.除之外(1)be relevant to和有关(2)relevance n.相关性；关联；实用性have relevance to与有关(1)IlearnthatyourecomingtovisitoneofyourChinesefriends.Imnowwritingtotellyousomerelevantdetails(相关细节).(2018全国)(2)同义句改写Idontthinkwhathesaidisrelevanttothetopicwearediscussing.Hehasmissedthepoint.Idontthinkwhathesaidhasrelevancetothetopicwearediscussing.Hehasmissedthepoint.by coincidence碰巧It is a coincidence that.恰巧的是(1)BycoincidenceIwillgotoo.Letsgotogether.碰巧我也去，咱们一同走吧。(2)Itwasacoincidencethathewasbornonhismothersbirthday.他在他母亲生日那天出生，真是巧事。(3)WhatacoincidencethatIwasinLondonatthesametimeasyou!真巧，你在伦敦时我也在那儿。condemnv.谴责；指责；宣判；迫使(某人)陷于不幸的境地condemn sb. for (doing) sth. 因(做)某事而指责某人condemn sb. to sth. 某人被处以某种刑罚；使某人被迫接受困境be condemned to.被判处be condemned to do.注定要做；使某人接受困境或不愉快的状况(1)Sheknewthatsocietywouldcondemnherforleavingherchildren.(2)Asanoldperson，oneisoftencondemnedtolive(live) alone.(3)Hewasfoundguiltyandcondemnedtodeath(被判处死刑).sacrificevt.牺牲，献出；献祭n.牺牲；供奉；祭品(1)sacrifice sth. to do sth. 牺牲去做某事sacrifice.for.为牺牲(2)at the sacrifice of.以牺牲为代价make a sacrifice/sacrifices做出牺牲(1)Almosteverygrandparentwantstobewithhisorhergrandchildrenandiswillingtomakesacrifices/asacrifice(做出牺牲).(2016全国)同义句改写(2)Hesacrificedhislifetosave(save) thechild.Hesavedthechildatthesacrificeofhislife.熟词生义选择句子中sacrifice的汉语意思(3)Acalfwasofferedupasasacrificetothegoddess.BA.牺牲B.供品；祭品C.奉献advocatevt.拥护；提倡，主张n.支持者；拥护者；提倡者(1)It is advocated that.主张，提倡advocate doing.主张做(2)(an) advocate of/for支持的人(1)Hesastrongadvocateof/forstateownershipoftherailways.他是铁路国有化的积极拥护者。句式升级(2)Theyadvocatethatthey(should)reduce(reduce) airpollution.Theyadvocatereducingairpollution.(改为简单句)Itisadvocatedthattheyshouldreduceairpollution.(用it作形式主语改写)易错点拨advocate后不跟不定式；跟从句时，从句中用虚拟语气(should) do。substitutev.替换；用代替n.代替物；代替者；代用品(1)a substitute for.的代替者/代用品(2)substitute A for Breplace B with/by A用A代替Bsubstitute for代替；取代(1)Sheisseekingasubstitutefortheverymanwhosedeparturemadehercry.一句多译(2)史密斯先生代替了那位生病的老师。MrSmithsubstitutedfortheteacherwhowassick.MrSmithtooktheplaceoftheteacherwhowassick.MrSmithwasinplaceoftheteacherwhowassick.根据语境用substitute，replace的正确形式填空(3)Thedriverreplacedtheworn-outtireswithnewones.(4)Wesubstitutedaredballfortheblueballtoseeifthebabywouldnotice.词义辨析substitute，replace这两个词的含义略有不同，substitute强调“代替，顶替”；而replace强调“替换，更换”，即把旧的或坏的东西更换成新的(通常用taketheplaceof更通俗些)。在句型结构上，通常是：substituteAforB“用A代替B”(使用A)；replaceAwith/byB“用B替换A”(使用B)。(1)threaten sb. with.用威胁某人threaten to do sth. 威胁要做某事(2)threat n.威胁a threat to sb. /sth. 对的威胁(1)Theresnosnakeknownthatwillhabituallyattackhumanbeingsunlessthreatened(threat) withitslife.(2)Thehijackers(劫持犯) threatenedtokill(kill) onepassengereveryhouriftheirdemandswerenotmet.(3)Terrorismisathreattothewholecountry.(4)Threatened(threat) byhisclassmates，thestudentdidnttellthetruthtotheteacher.roughadj.艰难的；粗糙的；粗略的；未加工的；粗暴的；危险的(1)be rough on对粗暴/苛刻in rough概略地；粗略地(2)roughly speaking大致说来；粗略地说(1)Thebosswasroughonhim(对他苛刻)，whichmadehimangry.(2)Roughlyspeaking(粗略地说)，Iwouldsaythatabout100peopleattendedtheexhibition.写出下列句子中rough的汉语意思(3)Theroughroadmadethecarshake.粗糙的；不平的(4)Heshadareallyroughtimerecently.艰难的(5)Thatareaofthecityisquiteroughafterdark.危险的(6)IvegotaroughideaofwhereIwanttogo.粗略的，大致的by means of用办法；借助by all means尽一切方法；当然可以by no meansnot by any means绝不，一点也不(位于句首时，句子用部分倒装语序)(1)Everypossiblemeanshasbeentried(try)，butnoneworked.(2)Hegotintothehousebymeansof(借助于) anopenwindow.句式升级(3)Illforgiveyouthistime，butyoushallbynomeansmakethemistakeagain.(改为倒装句)Illforgiveyouthistime，butbynomeansshallyoumakethemistakeagain.易错点拨means表示“方式”“方法”“手段”时，单复数同形。表示做某事的方法，means后常接of doing sth. ，一般不接不定式。(1)adopt an approach/a policy采用某方法/政策(2)adopted adj.被收养的；被采用的an adopted son养子(3)adoptive adj.收养的；有收养关系的an adoptive father养父(4)adoption n.收养；采纳；采用(1)Paulsmotherhadhimadopted(adopt) becauseshecouldntlookafterhimherself.(2)Hewascheatedintobelievingthathewasanadopted(adopt) son.(3)Havingadopted(adopt) anewmethod，theyworkedmoreefficiently.(4)Honey，shallweadoptadog?Adoptingapetdependsonwhetherwehavetheabilitytocareforit.Actually，wearesobusy.(adopt)(2018北京西城区模拟)(1)be considerate of/to/towards sb. 对体贴It is/was considerate of sb. to do sth. 某人做某事考虑得周到。(2)consider v.仔细考虑；细想；认为；以为consider doing.考虑做consider sb. /sth. (to be/as).认为某人(物)为all things considered总而言之；考虑到所有情况(3)consideration n.考虑；体谅take sth. into consideration考虑到某事；顾及某事(4)considering prep.&conj.考虑到；鉴于(1)ItwasconsiderateofMichaeltoinformusofhisdelayincasewegotworried.迈克尔通知我们他要迟一会儿以防我们担心，想得真周到。(2)Iconsiderhimtobe/asthebestcandidate.我认为他是最好的候选人。句式升级(3)Ifyoutakeallthingsintoconsideration，youwillfindthatgovernmentswouldwanttobandrugs.Takingallthingsintoconsideration，youwillfindthatgovernmentswouldwanttobandrugs.(用现在分词短语作状语改写)Withallthingstakenintoconsideration，youwillfindthatgovernmentswouldwanttobandrugs.(用with复合结构改写)表示“许多；大量”的词语可分为以下几类：(1)可数名词复数复数谓语动词(2)不可数名词单数谓语动词(3)可数名词复数或不可数名词(4)单数可数名词单数谓语动词(1)Largequantitiesoflandintheareahavebeenreserved(reserve) fornationalparkstheseyears，whichare(be) nowhometobears，wolves，andotherwildanimals.(2)Amongmammalsalone，thenumberofnocturnalspeciesis(be) astonishing.(3)Morethanonequestionwas(be) raisedatthemeetingyesterday.(4)Onesurveyshowsthatlargeamountsofwaterarewasted(waste) everyyearinChina，andthatonethirdisavailabletobesaved.易错点拨large quantities of后跟名词(可数或不可数)作主语，谓语动词一律用复数。large amounts of 后跟不可数名词作主语，谓语动词也用复数形式。the number of后跟名词作主语，表示“的数量”，谓语动词用单数。(1)refer.to.把提交给refer to.as.把称为/当作(2)reference n.提及；涉及；参考；参考书in/with reference to关于for reference以备查阅；以供参考(1)Thebookreferred(refer) toisnotinthelibrary.(2)TheChineserefertotheirlanguageasHan，asitbecamepopularamongthepeopleduringtheHanDynasty.写出下列句子中refer to的汉语意思(3)Completetheexerciseswithoutreferringtoadictionary.查阅(4)WhenIsaidsomepeoplewerestupid，Iwasntreferringtoyou.指的是(5)Yournotesareexcellentmaterialstorefertowhenyouarestudyingforatest.参考(6)Thenewlawdoesnotrefertothelandusedforfarming.涉及；提到联想发散“查词典”的各种表达形式：turn to a dictionary，refer to a dictionary，consult a dictionary，look.up in a dictionary。take turns轮流take turns to do./(in) doing.轮流做out of turn不按顺序地；不合时宜地by turns轮流地；交替地Its ones turn to do sth. 轮到某人做某事。(1)Morepeopleareusingonlineshopping，whichinturn(反过来) helpstheexpressdeliveryindustry.(2018河北石家庄二中模拟)(2)Itsmyturnto(轮到我) cleantheroom.(3)一句多译他们轮流开车。Theytookturnstodrivethecar.Theytookturns(in/at)drivingthecar.Theydrovethecarbyturns.lead sb. to do.使某人做lead sb. to.带某人去lead to (sb. ) doing sth. 导致(某人)做某事lead the way带路lead sb. by the nose牵着某人的鼻子走lead/live a .life过的生活(1)Inclass，Iwilldividethestudentsintosmallgroupsandleadthemtopractice(practice) speakingEnglishinaninterestingway.(2)Hisactionscouldleadtohimlosing(lose) hisjob.(3)Withhimleadingtheway(带路)，wegottherewithoutanydifficulty.Butforhim，wewouldhavebeenlost，whichwouldleadto(导致) seriousconsequences.Hisactionledustobelieve(使我们相信) thathewasourtruefriend.after all毕竟；终究above all最重要的是；首先first of all第一；首先in all全部；总共at all(否定句)一点也不；(疑问句)到底；究竟(1)Hehashisfaults，but，allinall，heisagoodhelper.他有缺点，但总的说来，他是个好帮手。(2)Firstofall，youshouldnothavescoldedtheboyatall；heisachildafterall.Aboveall，hemadeonlytwomistakesinall.首先，你根本不该责备那个男孩，毕竟他还是个孩子；最重要的是，他总共只犯了两处错误。易错点拨(1)aboveall重在强调所列举内容在所有事物中的位置最为重要。(2)firstofall，first及firstly侧重于强调列举事物的顺序，用于举例时表示“首先；第一”。break down出故障；失败；垮掉；分解break up粉碎；解散；放假；(关系等)破裂break out (战争、火灾等)爆发；突然开始(doing)break through取得突破break with与断交；背弃break into强行闯入；破门而入；插话；突然起来(n.)根据语境用break短语的正确形式填空(1)Thethiefbrokeawayfromthepolicemanandranaway.(2)WhenItoldthemmystory，thegirlbrokeintotears.(3)Somewomenbrokewithtraditionbygoingtostudyabroad.(4)Scientistssaytheyrebeginningtobreakthroughinthefightagainstcancer.(5)Whendidyoubreakupwithyourboyfriend?(6)Herhealthbrokedownunderthepressureofwork.Without these naturally occurring gases，the suns rays would bounce back into space leaving the Earth cold and impossible to live on.如果没有这些自然产生的气体，太阳的光线将会被反射回太空中去，那么地球将处于寒冷之中，从而使生物不可能在地球上存活。介词短语Without these naturally occurring gases代替虚拟条件句，用来表达虚拟的事实。有时表假设的情况隐含在一些词或短语中(如otherwise，but for，or等)。句式升级Icouldnthavefinishedtheworksosoonwithoutyourhelp.(1)Icouldnthavefinishedtheworksosoonifyouhadnthelpedme/ifithadntbeenforyourhelp.(用if引导的虚拟条件句改写)(2)Icouldnthavefinishedtheworksosoonbutforyourhelp.(用butfor改写)The last few years have seen environmental disasters on a grand scale，and experts are predicting far worse to come.在过去的几年里，人们已经经历了大规模的环境灾难，专家们预测更为严重的灾难即将来临。(1)see意为“见证，目睹，经历”时，常以表示时代、年代、世纪或地点的名词作主语，表示在某时或某地“目睹、发生、经历”了某事。(2)与see用法相同的动词还有find，witness，say，experience等，这些词在句中作谓语，用物作主语时，表示一种拟人的手法，以增添语言色彩，使表达更形象。句式升级Greatchangeshavetakenplaceinourhometownsincethereformandopeningpoliciesstarted.(用拟人的修辞手法改写)Ourhometownhasseen/witnessedgreatchangessincethereformandopeningpoliciesstarted.单句语法填空1.Inthatboxyouvegotsomethingthatispotentially(potential) goingtosavesomebodyslife.2.Iftherehadbeenanytalking，itwouldhavecaused(cause) ustolearnless.(2017全国)3.Italyhaswitnessed(witness) asharpincreaseinimmigrationinrecentyears.(2017浙江)4.Weadvocatesolving(solve) theUkraineissuebynegotiations.5.Hisillnessledtohisnotbeing(not，be) abletoattendthemeeting.6.Apartfromgoodservice，therestaurantoffersdifferentkindsoftraditionalFujiandishes.7.Given(give) thatthereisnotrafficdelay，Iwillbehereontime.8.Shesacrificedapromisingcareertolook(look) afterhersickdaughter.9.Oursoldiersarewillingtosacrificetheirlivestodefend(defend) ourcountry.10.Considering(consider) yoursalary，youshouldputasideatleast100dollarsaweek.11.Moststudentswantthatknowledgetoberelevanttotheirfuturecareers.12.Thebravesoldiersweredeterminedtosaveallthepeopletrapped(trap) intheflood.13.Toconstruct(construct) aworkingstill，useasharpstickorrocktodigaholefourfeetacrossandthreefeetdeep.(2017全国)14.Itisreportedthatthenewairportisstillunderconstruction(construct).15.Ifyoudrivethiscarwithoutalicence，youllhavetoanswerfortheconsequences.单句改错(每小题仅有1处错误)1.Itisclearthatallthemeansbeentried，butinvain.2.numberofgirlswerewaitingoutsidethegatetoseethefamousstar.3.Inthepastfewyears，thousandsoffilmshaveproducedallovertheworld.4.Thepolicemanseizedthethiefbyarmimmediately.5.Theoldcouplewereverykindandtheytreatedtheirsonverywell.6.Theyadvocatedthateveryonealow-carbonlife.7.“Itssuchaniceplace，”Mothersaidasshesatatthetableforcustomers.8.Iwassittingonthegrassitbegantorainheavily.9.Thisaccidentcondemnedtheoldmanapoorlife.10.Wemustobeytheprincipleallmenareinnocentuntiltheyareprovedguilty.11.ThepersontoatthemeetingwasafamousscientistfromtheUSA.12.Thediscoveryofnewevidenceledtothethiefscaught.教材与语法填空GlobalwarmingreferstoanaverageincreaseintheEarthstemperature,1.whichinturnleadstoclimatechange.Scientistsholdtheviewthatitcouldbeoneofthebiggestenvironmentalproblems2.facing(face) the21stcentury.Someofthescientistshavereportedthatitishumanbeingsthat3.arecausing(cause) changesintheEarthsclimate；forinthelast50years，gasespumpedintotheEarthsatmosphereb