选修8 Unit3 Inventorsandinventions要点梳理高效梳理·知识备考●重点单词1．distinguishvi.&vt.显示……的差别；使……有所不同；辨别2．mercifuladj.宽大的；仁慈的；慈悲的→mercyn．宽大；仁慈3．productn．产品4．abruptadj.突然的；意外的→abruptlyadv.突然地，唐突地5．convenientadj.便利的，方便的，就近的→conveniencen．方便，便利→convenientlyadv.便利地，方便地6．cautionn．小心，谨慎→cautiousadj.小心的，谨慎的→cautiouslyadv.小心地，谨慎地7．passiveadj.被动的；消极的；被动语态的8．seizevt.抓住；捉住；夺9．filen．文件；档案；文件夹vt.提交；将……归档10．freezingadj.冰冻的；严寒的→freezev．冰冻11．innocentadj.清白的；无罪的；天真的→innocencen．天真，清白12．bearvt.忍受；忍耐；负担13．tapvt.轻打；轻拍；轻敲n．轻轻地敲击(声)；(水)龙头14．currentn．(水或气)流；电流adj.现在的；当前的15．stableadj.稳固的；稳定的；安定的16．associatevt.联想；联系n．同伴，伙伴17．practicaladj.实际的；实践的；实用的18．competencen．能力；胜任；本领21\n●重点短语1．callup 给……打电话2．nowandthen偶尔；有时3．setabout开始；着手4．diveinto迅速把手伸入；一心投入5．setout(todo)开始(做)6．hangon不挂断；稍等；紧紧握住7．outoforder次序颠倒；发生故障8．getthrough设法联系上(尤指打通电话)；(设法)做完；通过9．ringback回复电话10．ringoff挂断电话●重点句型1．ThenextmorningIgotupearlybeforethesunwashot.第二天早上趁天还不太热，我就早早地起来了。2．Butoncepickedup,theytriedtobiteme.但是它们一被捡起来，就试图咬我。3．Onlyafteryouhavehadthatrecognitioncanyousaythatyouaretrulyaninventor.只有在你获得了那种认证后，你才能说是一个真正的发明家。4．Thecriteriaaresostrictthatitisdifficulttogetnewideasacceptedunlesstheyaretrulynovel.(评定)专利标准是很严格的，除非新的想法真是新颖的，否则很难被接受。5．Remembertoincludeonechangetoyourinventionincaseitdoesn‘tworkthefirsttime.记住对你的发明要有变化的余地，以防它第一次不起作用。21\n●高考范文(2007·海南，宁夏，全国Ⅰ)假定你是李华，希望通过外籍教师Peter找一位英国笔友。请写一封短信，描述一下你理想中笔友的条件，并说明为什么选这样的笔友。具体条件包括：1．年龄； 2.性别； 3.爱好(旅游、运动、养宠物等)。注意：1.词数100左右；2.可以适当增加细节，以使行文连贯；3.开头和结尾已为你写好。DearPeter，Iamwritingtoaskwhetheryouareabletodomeafavor.________________________________________________________________________Bestregards，LiHua[范文]Dear_Peter，I_am_writing_to_ask_whether_you_are_able_to_do_me_a_favor.Iwanttohaveapenfriend,hopefullyagirlinherearlytwenties,andwithinterestssimilartomine.Inmymind,sheissomeonewhoisinterestedintraveling,swimming,andplayingtabletennis.Besides,itwouldbebetterforhertohaveapetdogasIhavekeptoneathomeforsometime.Withsuchapenfriend,IhopeIcansharewithherourexperiencesintraveling,takingcareofpets,orwhateverwehaveincommon.AndIbelieveIwillimprovemyEnglishbydoingsoandlearnmoreabouthercountry.Ilookforwardtohearingfromyousoon.Best_regards，Li_Hua考点探究互动探究·能力备考21\nⅠ.词汇短语过关1．distinguishvi.&vt.辨别；显示……的差别distinguishedadj.卓越的，著名的，杰出的distinguishableadj.易分辨的，能区分的distinguishbetween...and...区分/辨别……和……distinguish...from...使……有别于……，使……具有区别于……的特征distinguishoneself(as...)(作为……)表现突出bedistinguishedby/for以……为特征/著名[即学即练1](1)He‘s____________________himself______ateacher.作为老师，他早已负有盛名。(2)Weshould__________________major______minorworkandnotputthetrivialabovetheimportant.我们的工作要分主次，不能轻重倒置。distinguishedasdistinguishbetweenand(3)Whatwasitthat_____________her______herclassmates?是什么使得她有别于班上其他同学呢？distinguishedfrom2．convenientadj.方便的；便利的；附近的conveniencen.方便，便利Itisconvenientforsb.todosth.做某事对某人来说是方便的。Sth.beconvenientto/forsb.对某人来说……是方便的。atsb‘sconvenience在某人方便的时候21\nconveniencefood方便食品conveniencestore便利店[即学即练2](1)Wemust____________aconvenienttimeandplace______themeeting.我们必须安排一个合适的时间和地点开会。(2)Whenwould________________________youtogo?你什么时候去方便？(3)Thehotelhasarestaurantfortheguests'_________.这家旅馆为方便旅客设有餐厅。arrangeforitbeconvenientforconvenience3．seizevt.抓住，捉住；把握(机会等)；夺取某物，占领某地seizesth.突然抓住seizeanopportunity抓住机会seizepower夺取政权beseizedwith被……侵扰；患/得(病)seizesb.bythearm抓住某人的手臂[即学即练3](1)He__________________andshookitheartily.他拉住她的手高兴地握着。(2)Theenemy__________________afteraviolentattack.敌人猛攻后占领了这个城镇。(3)He________________________goingabroad.他抓住了那次出国的机会。seizedherhandseizedthetownseizedthechanceof21\n(4)He_________________aslightattackoffever.他有一点发烧。wasseizedwith4．bearvt.(bore,borne)忍受；忍耐；负担；生育beardoing/n．/todo忍受……bearsb./sb.’sdoing忍受某人做某事bearsb./sth.out证实；为……作证bearwithsb./sth.耐心对待；容忍bearsth.inmind牢记[即学即练4](1)Icouldn‘t__________________anylonger,soIlefttheroom.我实在听不下去了，就离开了房间。(2)Ican’t_________________waiting.我不能忍受长时间的等待。(3)Idoubtifthatchairwill__________________.我怀疑那把椅子能否承受得了你的体重。beartolistenbearbeingkeptbearyourweight(4)Youmust________________________thatyourparentshopetodependonyoutobecomeadoctor.你要记住你的父母指望你成为一名好医生。(5)She____________threechildren.她生了三个孩子。bearitinmind hasborne(6)Who____________theresponsibility/expense?谁要负担这责任/费用呢？21\nwillbear提示：(1)bear作“忍受”讲时，其后接动名词做宾语，表示习惯性的动作，也可接不定式做宾语，表示某一次具体的动作，且多与can,could及beableto等连用。(2)borne和born是bear的两个过去分词，表示“出生，出世”时用born，并且仅用于被动语态，表示“生育”时用borne。5．associatevt.联想，联系n.同伴，伙伴accociationn．联合；联想；交往；协会；团体associatesb./sth.withsb./sth.把……和……联系在一起；由……联想到……beassociatedwith...和……有关associatewithsb.与某人交往或常打交道associateoneselfwithsth.声称或表示自己赞同某事物inassociationwith...与……合伙/合作[即学即练5](1)I’venever_____________you______thisplace.我从未把你和这个地方联系在一起。(2)Iwouldn’twantto__________________Mckey’sproject.我不想和麦基的计划有任何瓜葛。(3)Idon’tliketheselayaboutsyou’re____________.我不喜欢你结交的这些游手好闲的人。associatedwithbeassociatedwithassociatingwith6．callup召唤；使人想起；提出；打电话callat访问(某地)callon/upon访问(某人)callonsb.todosth.号召某人做某事21\ncallback召回，撤销callfor需要；要求callout大声喊叫callforth唤起，引起callin召集；收回calloff取消[即学即练6](1)Thetrip_____________________________ofmyyouth.旅行勾起了我对年轻时代的美好回忆。(2)He____________alltheinformationfromthecomputer.他从计算机中调出了所有的信息。calleduphappymemoriescalledup(3)He________________justtotellmethathehadboughtanewDVD.他打电话就是为了告诉我他买了一台新的DVD。calledmeup拓展：与打电话有关的短语：ring/callup打电话ring/callback回复电话ringoff挂断电话givesb.aring给某人打电话sb.bewantedonthephone有某人的电话answerthephone接电话hang/holdon不挂断电话7．setabout(doingsth.)开始；着手干某事setaside留出，拨出(时间、金钱等)，把……置于一旁setoutfor＝setofffor＝leavefor出发到某地去setouttodo开始做……21\nsetdown写下；记下；规定setoff动身；起程；激起；引起；使爆炸setup建立；设置；创建；开办[即学即练7](1)Youmust________________________atonce.你必须立即开始工作。(2)Doyouknowhowto__________________onthiswork？你知道怎样着手进行这项工作吗？(3)Bellnever________________________thetelephone.(＝Bellnever______________________thetelephone.)贝尔从来没打算去发明电话。setaboutyourwork setaboutgoingsetouttoinventsetaboutinventing(4)Whenarewe____________(＝___________)onourtrip？我们什么时候动身去旅行？settingoutsettingoff8．getthrough打通(电话)，完成(工作)，通过(考试)；克服(困难)getacross被理解；使人了解getdownto认真地静下心(工作)(to为介词)geton/along相处getoutof避免；摆脱getover克服getin收获getaround/round到处走动；传播出去getaway/off逃脱，离开[即学即练8]写出下列句子中getthrough的意思。(1)Itriedseveraltimes,butcouldn'tget21\nthrough.___________________(2)You'llgetthroughthisproblem._________________________打通(电话)克服(困难)(3)I'llgetthroughthisworkbynoon.____________________(4)Wewereverygladwhenweheardthatyouhadgotthroughyourexam.___________________完成(工作)通过(考试)拓展：gothrough经历；翻阅；检查lookthrough浏览，仔细检查livethrough活过一段时间；经历putthrough把电话接通Ⅱ.重点句型详解1．Butonce_picked_up,_theytriedtobiteme.但是它们一被捡起来，就试图咬我。(1)once作为连接词引导时间状语从句时，后面可接现在分词或过去分词。①Onceopened,themuseumwillbeverypopularwiththecitizens.博物馆一旦开放，肯定会受到市民的欢迎。(表被动)②Oncetalkingwithhim,you'llfindhimaneasygoingman.一旦与他交谈，你就会发现他是一个随和的人。(表主动)(2)once引导的从句中，要用一般时代替将来时。①OnceyouhavegraspedEnglish,you'llbeeasytogetawell－paidjob.一旦你掌握了英语，你就会很容易找到一份报酬很高的工作。(现在完成时代替将来完成时)21\n②Oncehearrives,wecanstart.他一到我们就可以开始。(一般现在时代替一般将来时)[即境活用1] (2007·福建)Youwillbesuccessfulintheinterview______youhaveconfidence.A．before B．onceC．untilD．though答案：B解析：考查状语从句。once“一旦”引导时间状语从句。before“在……以前”；until“直到……”；though“虽然”。2．Remembertoincludeonechangetoyourinventionin_caseitdoesn’tworkthefirsttime.记住对你的发明要有变化的余地，以防它第一次不起作用。incase(以防)万一incase后可接从句，也可置于句末。incaseof要是……；在……时候(后接名词或代词)inthiscase如果这样的话inthatcase如果那样的话inanycase无论如何innocase决不(位于句首，句子应使用倒装语序)①Takeyourumbrellaincaseitrains.拿着你的雨伞以防下雨。②IncaseIforget,pleaseremindmeofmypromise.如果我忘记了我的诺言，请提醒我。③Incaseoffire,openthissafetydoor.一旦发生火灾，打开这扇安全门。④Innocasemayyouleavethebabyaloneathome.你决不能把孩子一个人留在家里。[即境活用2] (2007·北京)Leaveyourkeywithaneighbor______youlockyourselfoutone21\nday.A．eversinceB．evenifC．soonafterD．incase答案：D解析：A项意为“自从……以来”，B项意为“即使”，C项意为“不久之后”，D项意为“以防；以免”。句意为“留一把钥匙给邻居，以免有一天你把自己锁在门外”。易错点拨自我完善·误区备考case构成的短语的用法[应用] (1)Itisreportedthattherewillbeaheavyraintomorrow,______thehikewouldbeputoff.A．inanycaseB．inwhichcaseC．innocaseD．incase答案：B解析：该题考查case的相关短语及定语从句，根据前面说“据说明天有大雨”，可知hike在这种情况下要推迟，which引导定语从句，指代整个主句。(2)－Thefirstbushasjustleftandthenextbuswillcomeintwentyminutes.－______，wewillhavetowait.A．InthiscaseB．InthiswayC．BythismeansD．Intheend答案：A(3)Johnmayphonetonight.Idon’twanttogoout______hephones.A．aslongasB．inorderthatC．incaseD．sothat答案：C解析：aslongas意为“只要”，inorderthat意为“为了”，incase意为“以防”，sothat意为“以致；为了”。incase引导条件状语从句。(4)Idon’tthinkI’llneedanymoney,butI’llbringsome______.A．atlastB．in21\ncaseC．onceagainD．intime答案：B解析：根据句子中所说自己目前不需要钱，可是要带一点备用或者以防万一。incase是“以防万一”的意思，恰好符合此意。intime是“及时，恰好，迟早”的意思。(5)You’dbettertakesomethingtoreadwhenyougotoseethedoctor______youhavetowait.A．evenifB．asifC．incaseD．inorderthat答案：C高效作业自我测评·技能备考Ⅰ.单词拼写1．Successinmoney－makingisnotalwaysagoodc__________ofrealsuccessinlife.2．It’sf___________outside.You’dbetterputonmoreclothes.3．Thepacketofwhitep_________thepolicefoundinhisroomturnedouttobecocaine.4．Whatweneedisas__________government.5．Yourinventionisingenious,butnotveryp__________.criterion freezingpowderstablepractical6．Heis__________(清白的，无罪的)ofthecharge.7．He_____________(使……扬名)himselfbyhiscourageatthattime.8．Ikeepmyreferencebooksnearmydeskfor_________(方便)．9．Heatealightlunchin____________(期望)ofagooddinner.10．Shelikesinventionsandshehasappliedfor________(专利)．21\ninnocent distinguishedconvenienceexpectationpatentⅡ.单项选择1．－Jack,you______onthephone.－______.A．arewanted;ComingB．areneeded;I’mcomingC．arecalled;I’llcomeD．arerungup;Thanks答案：A解析：考查电话用语。叫人接电话时常用表达有：Youarewantedonthephone./Thereisacallforyou./Foryou.回答用：I’mcoming.或Coming.2．Whoeverinvented______wheelisbelievedtohavemade______mostusefulinventionin______history.A．a;the;/ B．the;the;/C．the;/;/D．a;a;the答案：B解析：发明物的前面必须用the；第二空用the表示最高级，故加定冠词the;inhistory为固定搭配，意为“在历史上”，不加任何冠词。3．Watercanabsorbandgiveoffalotofheatwithoutbigchangesintemperature,thuscreatinga______environment.A．peacefulB．sensitiveC．commonD．stable答案：D解析：A项“平静的”；B项“敏感的”；C项“共同的”；D项“稳定的”。句意为：水能吸收和放出许多热量，这在温度上没有大的变化，因而就创造出了一个稳定的环境。21\n4．Havingdecidedtorentaflat,we______contactingalltheaccommodationagenciesinthecity.A．setaboutB．setdownC．setoutD．setup答案：A解析：考查动词短语。setaboutdoing＝setouttodo开始着手做某事；setdown写下，记下；setup建立。5．Colorblindpeopleoftenfinditdifficultto______betweenblueandgreen.A．separateB．distinguishC．compareD．contrast答案：B解析：句意为：色盲的人经常感到很难区分蓝色和绿色。separate“分离，分开”，但与between不能连用；distinguishbetween“分辨，辨别”；compare(to/with)比较，对照；contrast(with)形成对比。6．Whenweplanourvacation,Motheroftenoffers______suggestions.A．carefulB．practicalC．effectiveD．acceptable答案：B解析：本题考查形容词词义辨析。careful“仔细的，小心的”；practical“可行的，实用的”；effective“有效的，生效的”；acceptable“可接受的，受到欢迎的”。本句的意思是：当我们计划假期的时候，妈妈经常提出实用、可行的建议。因此B项最佳。7．—Areyoureadytoleave?—Almost.I'llbereadytogoassoonasI______puttingthecleandishesaway.A．getthroughB．giveupC．goonD．setabout答案：A解析：getthrough(doing)sth.完成某事。giveup(doing)sth.放弃；goondoing继续；setaboutdoing开始做。8．IamsurethatLaura'slatestplay,______staged,willproveagreatsuccess.A．sinceB．21\nunlessC．onceD．until答案：C解析：考查“once＋过去分词”。其中为省略句oncethelatestplayisstaged。9．(2010·安徽皖南八校二联)WithoutthehelpofmyEnglishteacher,I______thefirstprizeintheEnglishspeakingcompetition.A．wouldwinB．wouldhavewonC．wouldnotwinD．wouldnothavewon答案：D解析：考查虚拟语气。这是一个隐含的虚拟条件句，含有ifmyEnglishteacherhadn‘thelpedmewithmyspokenEnglish之意，表示与过去的事实相反，故用与过去相反的虚拟语气，因此D项符合题意。10．Woulditbe______foryoutopickmeupatfouro'clockandtakemetotheairport?A．freeB．vacantC．handyD．convenient答案：D解析：句意：你四点钟接我并把我送到机场方便吗？Itisconvenientforsb.todosth.某人做某事方便。11．Doesthismealcost$50?I______somethingfarbetterthanthis!A．preferB．expectC．suggestD．suppose答案：B解析：考查动词辨析。expect期望；期盼；prefer更喜欢；suggest建议；suppose猜想；认为。12．Hecan'tbear______inpublic.A．tolaughatB．tobelaughedatC．laughingatD．laughat答案：B解析：本题中bear为“承受”的意思。也可表示为bearbeinglaughedat。21\n13．AsIgrewupinasmalltownatthefootofamountain,thevisittothevillage______scenesofmychildhood.A．calledupB．calledforC．calledonD．calledin答案：A解析：A.“唤起”，B.“需要”，C.“号召”，D.“召集”。本题题意为“……本次参观使我想起了童年的情景”。因此选A。14．(2010·北京东城期末)－Hello,everyone!HaveyouheardthemeetingwillbeputofftillnextTuesday?－That'swhatwe______aboutwhenyoucamein.A．aretalkingB．weretalkingC．talkD．talked答案：B解析：考查动词的时态。“那就是你进来时我们正在讨论的事情”。此处“讨论”的动作发生在“你进来时”，所以用进行时态，同时从camein可以看出用“过去进行时态”。答案应该选B项。15．(2010·唐山摸底考试)Hewassodeepinthought,thinkingoftheproblem______heknockedintothetreewithoutnoticingit.A．whenB．whileC．becauseD．that答案：D解析：考查状语从句的引导词。so...that表示“如此，以致”。他思考问题太投入了，以致一不留神儿撞到了树上。Ⅲ.阅读理解AChinawillplantomakenewrulestogivemorecontrolsoverthegrowingnumberofblogsandwebcasts(网上直播)．Nowadays,advancednetworktechnologies,suchasHoggingandwebcasting,arebeingimprovedtochallengethegovernment'sabilitytowatchovertheInternet.ChinesegovernmentwasinthemiddleofmakingnewrulesoverInternetpublishing,andblogsandwebsitesthatpublishingwebcastswouldfallundertheserules.21\nGovernmentofficialshopethenewruleswouldensureamorehealthyandactiveInternetenvironmentandwouldfullyrespectandprotectChinesecitizens'freedomofspeech.Specificdetailsonwhatkindofruleswouldbecarriedoutarestillunknowntothepublic.Despitethegrowingpopularity,bloggersandwebcastershavebeenunpopularwithpublicationinstitutions.In2006,aseriesofcasesinvolvingbloggerswhohaddivedintootherpeople'sprivacyandwrittenmaterialsruiningothers'fameurgedthegovernmenttoconsiderwhethertorequirebloggerstousetheirrealnameswhentheylogin.Webcastingwithoutcopyrightandillegally“copying”productsfromcopyrightedmaterialshavealsoledgovernmentofficialstoconsiderstartinganationwidecheckofonlinevideobroadcasting,andallowonlyqualifiedwebsitestocontinueofferingwebcasts.1．Whatcanbethebesttitleofthepassage?A．TheIncreasesofBlogsandWebcastsB．NewRulestoControlInternetPublishingC．TechnologiesChallengetheGovernmentD．ThePopularityofOnlineVideoBroadcasting答案及解析：1．B。主旨大意题。第一段就概括了本文的大意。2.ChinesegovernmentthinksthecurrentInternetenvironmentis______.A．quitehealthyB．lessactiveC．ratherhopefulD．lesspiloted答案及解析：2．D。由第四段可知。3.WhichofthefollowingisTRUEaccordingtothepassage?A.Publicationinstitutionsareunhappywithbloggersandwebcasters.B.Allbloggersandwebcastersliketodigoutotherpeople'sprivacy.C.Webcastersarequiteawareofthecopyrightissueswhileonline.D.Copyrightedmaterialscanonlybeofferedtoqualifiedwebsites.21\n答案及解析：3．A。由第五段可知A项正确。BTheworldeconomyhasrunintoabrickwall.Despitecountlesswarningsinrecentyearsabouttheneedtoaddressalooming(逼近)hungercrisisinpoorcountriesandaloomingenergycrisisworldwide,worldleadersfailedtothinkahead.Theresultisaglobalfoodcrisis.Wheat,cornandricepriceshavemorethandoubledinthepasttwoyears.Andoilpriceshaveincreasedmorethanthreetimessincethestavtof2004.Thesefoodpricesincreases,combinedwithsoaringenergycosts,willslowifnotstopeconomicgrowthinmanypartsoftheworldandwillevenundermine(破坏)politicalstability,asevidencedbytheprotestriotsthathaveeruptedinplaceslikeHaiti,BangladeshandBurkinaFaso.Practicalsolutionstothesegrowingwoesdoexist,butwe'llhavetostartthinkingaheadandactingglobally.So,whatshouldbedone？Herearethreestepstoeasethecurrentcrisisandavert(防止，避免)thepotentialforaglobaldisaster.Thefirstistoscaleup(按比例增加，扩大)thedramaticsuccessofMalawi,afamineprone(遭遇饥荒)countryinsouthernAfrica,whichthreeyearsagoestablishedaspecialfundtohelpitsfarmersgetfertilizerandhighyieldseeds.Malawi‘sharvestdoubledafterjustoneyear.AninternationalfundbasedontheMalawimodelwouldcostamere$10perpersonannuallyintherichworld,or$10billioninall.Second,theUSandEuropeshouldabandontheirpoliciesofsubsidizing(给补助金)theconversionoffoodintobiofuels(生物燃料)．Third,weurgentlyneedtoweatherproof(使防风雨)theworld'scropsassoonandaseffectivelyaspossible.Forapoorfarmer,sometimessomethingassimpleasafarmpond—whichcollectsrainwatertobeusedforemergencyirrigationinadryspell—canmakethedifferencebetweenabountifulcropandafamine.TheworldhasalreadycommittedtoestablishingaClimateAdaptationFundtohelppoorregions,climateproofvitaleconomicactivitiessuchasfoodproductionandhealthcare,buthasnotyetacteduponthepromise.21\nThefoodcrisisprovidesnotonlyawarningbutalsoanopportunity.Weneedtoinvestvastlymoreinsustainabledevelopmentinordertoachievetrueglobalsecurityandeconomicgrowth.4.Whichofthefollowingisthebesttitle?A.HowtoEndtheGlobalFoodShortage.B.HowtoEndtheGlobalDisaster.C.HowtoHelptheFarmersinthePoorCountries.D.HowtoSubsidizetheFarmerstoIncreaseFoodProducts.答案及解析：4．A。主旨大意题。文章主要讲如何结束全球食物短缺，A能概括文章中的主要内容。B、C、D都是文章中的一部分。5.Theword“woes”inparagraphoneismostlikelytomean______.A.hungerB.thingsC.mattersD.disasters答案及解析：5．D。词义猜测题。从下文中Herearethreestepstoeasethecurrentcrisisandavert(防止，避免)thepotentialforaglobaldisaster.可以猜出词义。6.Whatdoestheauthorthinkoftheglobalfoodshortage?A.Peopleintheworldcandonothing.B.Theglobalfoodcrisiswillcontinue.C.Thefoodcrisisprovidesnotonlyawarningbutalsoanopportunity.D.Wedon'know.答案及解析：6．C。事实细节题，文中最后一段可知。7.Whatmeasuresshouldbetakentoeasethecurrentcrisisandavertthepotentialforaglobaldisaster?A.Toscale－upthedramaticsuccessofMalawi.B.TheU．S.andEuropeshouldabandontheirpoliciesofsubsidizingtheconversionoffoodintobiofuels.C.Topreventtheworld'scropsfrombeingdestroyedbyweatherassoonandaseffectivelyaspossible.D.Allabove.答案及解析：7．D。事实细节题，从文章中第二、三、四段可知。21\n21
