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一、听录音回答问题Wheremustthepumahavecomefrom?注意这里的must并不是必须的意思，表示很有可能，是一种推断和猜测。从这篇文章中我们会听到wherehaditcomefrom这句话，那后面的内容就可能是问题答案：thisonemusthavebeeninthepossessionofaprivatecollector.也就是说美洲狮是私人豢养的。二、课文讲解1.puman.美洲狮（largebrownAmericananimalofcatfamily)同义词：cougar[ˈku:gə(r)];mountainlion2.atlarge:(囚犯）在逃，逍遥法外：Theescapedprisonerisstillatlarge.那个逃犯仍逍遥法外。总的来说：Thepeopleatlargewantpeace.总的来说，人民是渴望和平的。详细地：Shetalkedatlargeaboutherplans.她详细地谈了她的打算。3.spot(spotted)v.看见，发现（toseeornoticeapersonorthing,especiallysuddenlyorwhenitisdifficulttosee)(不用于进行时）E.g:Ifinallyspottedmyfriendinthecrowd.我终于在人群中看见了我的朋友。Shespottedsmokecomingoutofthehouse.她看见有烟从房子里冒出来。Noonespottedthathemadeamistake.没有人留意到他犯了个错误。Isoonspottedwhatthemistakewas.我很快就看出了错误所在。n.斑点，污点E.g:Shewaswearingablackskirtwithwhitespots.她穿着一条黑底白点的裙子。Hiscoatwascoveredwithspotsofmud.他的外套满是泥点。spot还有一些同义词，例如文章第6行的see,以及第10行的observe,都有看见的意思。see是最常用的词，强调结果，看见，发现；observe比see更正式，英文解释：watchsb/sthcarefully,especiallytolearnmoreaboutthem,更注重“观察”的意思IfelthewasobservingeverythingIdid.我觉得他正在注视着我做的每一件事。spot表示看到了不太容易看到的东西。4.Whenreportcameinto.....takenseriously.这是一句同位语从句。同位语从句是解释说明某一名词的从句。被同位语从句所修饰的名词称为先行词，如句子中的report，不是所有的名词都可以跟同位语从句，常可以被同位语从句修饰的名词有belief（信念）；doubt（怀疑）；explanation（解释）；idea（主意）；thought（想法）；truth（事实）；suggestion（建议）；warning（警告）。常用的引导词主要有that,whether,why,who,where,how,when等。There’ssomedoubtwhetherJohnwillcomeontime.对约翰是否会准时到有一些怀疑。Ihavenoideawhyshequitherpresentjob.我不知道她为什么辞职。Thequestionwhoshoulddotheworkrequiresconsideration.谁该做这项工作，这个问题需要考虑。Wehaven’tyetsettledthequestionwherewearegoingtospendoursummervacation.我们还没有决定到什么地方去度暑假。Ourteachergaveussomeadvicehowweshouldusethecomputer.老师给我们提出了如何使用电脑的建议。5.takesth/sbseriously重视Don’ttakeitseriously.别太当真。takesthlightly草率对待6.evidencen.证据（不可数）Whenthepolicearrived,hehadalreadydestroyedtheevidence.beinevidence显而易见的Thefirstsignsofspringareinevidence.春天的最初迹象已显然可见。evidentadj.明显的；evidentlyadv.明显地7.accumulatev.积累，积聚（tograduallygathersthoveraperiodoftime;toincreaseinnumberorquality)强调积累的过程Ihaveaccumulatedalotofbooks.我已经收集了很多书。gather：聚集，把某人聚集在某处（tocometogetherorbringpeopletogetherinoneplacetoformagroup)Thekidsweregatheredtogetherinoneroom.孩子们被聚拢在一间屋子里。collect：收集，采集（tobringthingstogetherfromdifferentpeopleorplaces)collectdata/evidence/information收集资料、证据、信息collectstamps集邮assemble集合，集会；装配(cometogetherasagroup)Alargenumberofpeopleassembleonthesquare.8.feelobligedtodosth感到不得不做某事oblige：（以法律、义务等）强迫、迫使（toforcesbtodosth)obligesbtodosth迫使某人做某事Parentsareobligedbylawtosendtheirchildrentoschool.法律规定父母必须送子女入学。Hisseriousinjuryobligedhimtogiveupwork.他受伤严重，不得已只好辞掉工作。9.claimto声称claimtohavedonesth声称曾经做过某事Heclaimedtohavebeenthemanagerofthelargeshop.10.huntn.追猎，寻找(forsb/sth)Manypeoplehadhelpedinthehuntforthemissingboy.许多人曾帮助搜寻一个失踪的男孩。v.打猎，搜寻Lionssometimeshuntalone.狮子有时单独猎食。Policearehuntinganescapedcriminal.警察正在追捕一名逃犯。11.yard码（长度单位，等于3英尺或36英寸，或约91.4厘米）英尺foot（feet）英寸inch厘米centimeter12.cornern.角落thecornerofthemagazine杂志的一角；thecornerofaroom房间角落Inacorner,inatightcorner身处困境v.使走投无路Themanwasfinallycorneredbypoliceinagarage.那人最终被警方逼到了车库。Theproblemcorneredme.这个问题把我难倒了。13.prove+adj./provetobe=turnouttobe证明是，原来是Therumorprovedfalse.谣言证明是错误的。14.trailn.一串，一系列；足迹atrialofblood一串血痕V.跟踪=followsecretlyThepolicetrailedhimfordays.警方跟踪了他多日。15.cling(clung,clung,clinging)(tosth/sb;ontosth)v.粘Sheisalwaysclingingtohermother.Heclungtothehopethathewouldsucceed.(抱有，怀有梦想、希望）stickv.粘住sticktheenvelopstickto坚持sticktotheplan,sticktoone’spromise16.complaintosbabout/ofsth抱怨，埋怨complainabout抱怨complainabouttheweather抱怨天气不好complainofsth诉说（病情或疼痛）；主诉Sheleftearly,complainingofaheadache.她说自己头疼，很早就离开了。17.convincev.使信服convincingadj.令人信服的convincesbofsth使某人相信某事Youwillneedtoconvincethemofyourenthusiasmforthejob.你要使他们相信你殷切希望得到这份工作。convincethat......Iamconvincedthatsheisanoptimisticgirl.18.inthepossessionof为......所有（含被动意思，主语为物）Thelandisinthepossessionofthebusinessman.这块地为该商人所有。inpossessionof拥有，持有（含主动意思，主语为人）Thebusinessmanisinpossessionoftheland.19.somehowadv.不知为什么，不知怎么地（forareasonthatyoudon’tknoworunderstand)Igotlostsomehow.不知怎么的，我迷路了。以某种方式（inawaythatisnotknownorcertain)Wemuststophimfromseeinghersomehow.不管怎么着，我们都不能让他见到她。somewhat稍微，有点ThepriceissomewhathigherthanIexpected.20.disturbv.令人不安Theletterdisturbedme.disturbingadj.令人不安的disturbedadj.感到不安的surprising,surprised;exciting,excited.