1、一、听录音回答问题Where must the puma have come from?This one must have been in the possession of a private collector.Where had it come from?二、课文讲解1.puma n.美洲狮 (large brown American animal of cat family)=cougar;mountain lion2.at large（囚犯）在逃，逍遥法外e.g.The escaped prisoner is still at large.总的来说e.g.The people at
2、 large want peace.详细地e.g.She talked at large about her plans.3.spot (spotted)v.看见，发现(to see or notice a person or thing,especially suddenly or when it is difficult to see)e.g.I finally spotted my friend in the crowd.She spotted smoking coming out of the house.No one spotted that he made s mistake.I
3、soon spotted what the mistake was.n.斑点，污点e.g.She was wearing a black skirt with white sopts.His coat was covered with sopts of mud.see:最常用，强调结果observe:watch sb/sth carefully,especially to learn more about them 观察e.g.I felt he was observing everything I did.4.同位语从句先行词：belief;doubt;explanation;idea;th
4、ought;truth;suggestion;warning引导词：that;whether;why;who;where;how;when等e.g.Theres some doubt whether John will come on time.I have no idea why she quit her present job.The question who should do the work requires consideration.We havent yet settled the question where we are going to spend our summer
5、vacation.Our teacher gave us some advice how we should use the computer.5.take sth/sb seriouslye.g.Dont take it seriously.take sth lightly 草率对待6.evidence n.证据（不可数）e.g.When the police arrived,he had already destroyed the evidence.be in evidence 显而易见的e.g.The first signs of spring are in evidence.evide
6、nt adj.明显的evidently adv.明显地7.accumulate v.积累，积聚(to gradually gather sth over a period of time;toincrease in number or quality)e.g.I have accumulated a lot of books.gather:聚集e.g.The kids were gathered together in one room.collect:收集，采集e.g.collect data/evidence/information collect stampsassemble:集合，集会
7、；装配e.g.A large number of people assemble on the square.8.feel obliged to do 感到不得不做某事oblige：（以法律、义务等）强迫，迫使oblige sb to do sth 迫使某人做某事e.g.Parents are obliged by law to send their children to school.His serious injury obliged him to give up work.9.claim to 声称claim to have done sth 声称曾经做过某事e.g.He claime
8、d to have been the manager of the large shop.10.hunt n.追猎，寻找(for sb/sth)e.g.Many people had helped in the hunt for the missing boy.v.打猎，搜寻e.g.Lions sometimes hunt alone.Police are hunting an escaped criminal.11.yard 码（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.corner n.角落 the corner of the
9、 magazine 杂志的一角；the corner of a room 房间角落in a corner,in a tight corner 身处困境 v.使走投无路e.g.The man was finally cornered by police in a garage.The problem cornered me.13.prove+adj./prove to be=turn out to be 证明是，原来是e.g.The rumor proved false.14.trail n.一串，一系列；足迹 a trial of blood 一串血痕 v.跟踪=follow secretly
10、e.g.The police trailed him for days.15.cling(clung,clung,clinging)(to sth/sb;on to sth)v.粘e.g.She is always clinging to her mother.He clung to the hope that he would succeed.(抱有，怀有梦想、希望）stick v.粘住 stick the envelopstick to 坚持 stick to the plan,stick to ones plain to sb about/of sth 抱怨，埋怨 complain ab
11、out 抱怨 plain about the weather 抱怨天气不好complain of sth 诉说（病情或疼痛）；主诉e.g.She left early,complaining of a headache.17.convince v.使信服 convincing adj.令人信服的convince sb of sth 使某人相信某事e.g.You will need to convince them of your enthusiasm for the job.convince that.e.g.I am convinced that she is an optimistic g
12、irl.18.in the possession of 为.所有（含被动意思，主语为物）e.g.The land is in the possession of the businessman.in possession of 拥有，持有（含主动意思，主语为人）e.g.The businessman is in possession of the land.19.somehow adv.不知为什么，不知怎么地（for a reason that you dont know or understand)e.g.I got lost somehow.以某种方式（in a way that is not known or certain)e.g.We must stop him from seeing her somehow.somewhat 稍微，有点e.g.The price is somewhat higher than I expected.20.disturb v.令人不安e.g.The letter disturbed me.disturbing adj.令人不安的disturbed adj.感到不安的surprising,surprised;exciting,excited.
