一、听录音回答问题
Where must the puma have come from?
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where had it come from这句话， 那后面的内容就可能是问题答案：this one must have been in the possession of a private collector.也就是说美洲狮是私人豢养的。
二、课文讲解
1. puma n. 美洲狮 （large brown American animal of cat family)
同义词：cougar [ˈku:gə(r)]; mountain lion
2. at large:
(囚犯）在逃，逍遥法外：The escaped prisoner is still at large.那个逃犯仍逍遥法外。 总的来说：The people at large want peace.总的来说，人民是渴望和平的。
详细地：She talked at large about her plans.她详细地谈了她的打算。
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) (不用于进行时）
E.g: I finally spotted my friend in the crowd.我终于在人群中看见了我的朋友。
She spotted smoke coming out of the house.她看见有烟从房子里冒出来。
No one spotted that he made a mistake.没有人留意到他犯了个错误。
I soon spotted what the mistake was.我很快就看出了错误所在。
n. 斑点，污点
E.g: She was wearing a black skirt with white spots.她穿着一条黑底白点的裙子。
His coat was covered with spots of mud.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：watch sb/sth carefully,especially to learn more about them,更注重“观察”的意思
I felt he was observing everything I did. 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. When report came into..... taken seriously. 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’s some doubt whether John will come on time.对约翰是否会准时到有一些怀疑。 I have no idea why she quit her present job.我不知道她为什么辞职。
The question who should do the work requires consideration.谁该做这项工作，这个问题需要考虑。
We haven’t yet settled the question where we are going to spend our summer vacation.我们还没有决定到什么地方去度暑假。
Our teacher gave us some advice how we should use the computer.老师给我们提出了如何使用电脑的建议。
5. take sth/sb seriously 重视
Don’t take it seriously. 别太当真。
take sth lightly 草率对待
6. evidence n. 证据（不可数）
When the police arrived, he had already destroyed the evidence.
be in evidence 显而易见的
The first signs of spring are in evidence. 春天的最初迹象已显然可见。
evident 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; to increase in number or quality) 强调积累的过程
I have accumulated a lot of books.我已经收集了很多书。 ：聚集，把某人聚集在某处（to come together or bring people together in one place to form a group)
The kids were gathered together in one room.孩子们被聚拢在一间屋子里。 to bring things together from different people or places)
collect data/ evidence/ information 收集资料、证据、信息
collect stamps 集邮 集合，集会；装配 (come together as a group)
A large number of people assemble on the square.
8. feel obliged to do sth 感到不得不做某事
oblige：（以法律、义务等）强迫、迫使 （to force sb to do sth)
oblige sb to do sth迫使某人做某事
Parents are obliged by law to send their children to school.法律规定父母必须送子女入学。 His serious injury obliged him to give up work. 他受伤严重，不得已只好辞掉工作。
9. claim to 声称
claim to have done sth 声称曾经做过某事
He claimed to have been the manager of the large shop.
10. hunt
n. 追猎，寻找 (for sb/ sth)
Many people had helped in the hunt for the missing boy. 许多人曾帮助搜寻一个失踪的男孩。 v. 打猎，搜寻
Lions sometimes hunt alone. 狮子有时单独猎食。
Police are hunting an escaped criminal. 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centimeter
12. corner
n. 角落 the corner of the 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
The man was finally cornered by police in a garage. 那人最终被警方逼到了车库。 The problem cornered me. 这个问题把我难倒了。
13. prove+ adj. /prove to be =turn out to be 证明是，原来是
The rumor proved false. 谣言证明是错误的。
14. trail n. 一串，一系列；足迹 a trial of blood 一串血痕
V. 跟踪 = follow secretly
The police trailed him for days. 警方跟踪了他多日。
15. cling (clung, clung, clinging) (to sth/ sb; on to sth) v. 粘
She is always clinging to her mother.
He clung to the hope that he would succeed. (抱有，怀有梦想、希望） v. 粘住 stick the envelop
stick to 坚持 stick to the plan, stick to one’s promise
16. complain to sb about/of sth 抱怨，埋怨
complain about 抱怨 complain about the weather 抱怨天气不好
complain of sth 诉说（病情或疼痛）；主诉
She left early, complaining of a headache. 她说自己头疼，很早就离开了。
17. convince v. 使信服 convincing adj.令人信服的
convince sb of sth 使某人相信某事
You will need to convince them of your enthusiasm for the job. 你要使他们相信你殷切希望得到这份工作。
convince that......
I am convinced that she is an optimistic girl.
18. in the possession of 为......所有（含被动意思，主语为物）
The land is in the possession of the businessman. 这块地为该商人所有。
in possession of 拥有，持有（含主动意思，主语为人）
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 don’t know or understand)
I got lost somehow. 不知怎么的，我迷路了。
以某种方式（in a way that is not known or certain)
We must stop him from seeing her somehow. 不管怎么着，我们都不能让他见到她。 somewhat 稍微，有点
The price is somewhat higher than I expected.
20. disturb v. 令人不安
The letter disturbed me.
disturbing adj. 令人不安的
disturbed adj. 感到不安的
surprising, surprised; exciting, excited.
一、听录音回答问题
Where must the puma have come from?
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where had it come from这句话， 那后面的内容就可能是问题答案：this one must have been in the possession of a private collector.也就是说美洲狮是私人豢养的。
二、课文讲解
1. puma n. 美洲狮 （large brown American animal of cat family)
同义词：cougar [ˈku:gə(r)]; mountain lion
2. at large:
(囚犯）在逃，逍遥法外：The escaped prisoner is still at large.那个逃犯仍逍遥法外。 总的来说：The people at large want peace.总的来说，人民是渴望和平的。
详细地：She talked at large about her plans.她详细地谈了她的打算。
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) (不用于进行时）
E.g: I finally spotted my friend in the crowd.我终于在人群中看见了我的朋友。
She spotted smoke coming out of the house.她看见有烟从房子里冒出来。
No one spotted that he made a mistake.没有人留意到他犯了个错误。
I soon spotted what the mistake was.我很快就看出了错误所在。
n. 斑点，污点
E.g: She was wearing a black skirt with white spots.她穿着一条黑底白点的裙子。
His coat was covered with spots of mud.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：watch sb/sth carefully,especially to learn more about them,更注重“观察”的意思
I felt he was observing everything I did. 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. When report came into..... taken seriously. 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’s some doubt whether John will come on time.对约翰是否会准时到有一些怀疑。 I have no idea why she quit her present job.我不知道她为什么辞职。
The question who should do the work requires consideration.谁该做这项工作，这个问题需要考虑。
We haven’t yet settled the question where we are going to spend our summer vacation.我们还没有决定到什么地方去度暑假。
Our teacher gave us some advice how we should use the computer.老师给我们提出了如何使用电脑的建议。
5. take sth/sb seriously 重视
Don’t take it seriously. 别太当真。
take sth lightly 草率对待
6. evidence n. 证据（不可数）
When the police arrived, he had already destroyed the evidence.
be in evidence 显而易见的
The first signs of spring are in evidence. 春天的最初迹象已显然可见。
evident 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; to increase in number or quality) 强调积累的过程
I have accumulated a lot of books.我已经收集了很多书。 ：聚集，把某人聚集在某处（to come together or bring people together in one place to form a group)
The kids were gathered together in one room.孩子们被聚拢在一间屋子里。 to bring things together from different people or places)
collect data/ evidence/ information 收集资料、证据、信息
collect stamps 集邮 集合，集会；装配 (come together as a group)
A large number of people assemble on the square.
8. feel obliged to do sth 感到不得不做某事
oblige：（以法律、义务等）强迫、迫使 （to force sb to do sth)
oblige sb to do sth迫使某人做某事
Parents are obliged by law to send their children to school.法律规定父母必须送子女入学。 His serious injury obliged him to give up work. 他受伤严重，不得已只好辞掉工作。
9. claim to 声称
claim to have done sth 声称曾经做过某事
He claimed to have been the manager of the large shop.
10. hunt
n. 追猎，寻找 (for sb/ sth)
Many people had helped in the hunt for the missing boy. 许多人曾帮助搜寻一个失踪的男孩。 v. 打猎，搜寻
Lions sometimes hunt alone. 狮子有时单独猎食。
Police are hunting an escaped criminal. 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centimeter
12. corner
n. 角落 the corner of the 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
The man was finally cornered by police in a garage. 那人最终被警方逼到了车库。 The problem cornered me. 这个问题把我难倒了。
13. prove+ adj. /prove to be =turn out to be 证明是，原来是
The rumor proved false. 谣言证明是错误的。
14. trail n. 一串，一系列；足迹 a trial of blood 一串血痕
V. 跟踪 = follow secretly
The police trailed him for days. 警方跟踪了他多日。
15. cling (clung, clung, clinging) (to sth/ sb; on to sth) v. 粘
She is always clinging to her mother.
He clung to the hope that he would succeed. (抱有，怀有梦想、希望） v. 粘住 stick the envelop
stick to 坚持 stick to the plan, stick to one’s promise
16. complain to sb about/of sth 抱怨，埋怨
complain about 抱怨 complain about the weather 抱怨天气不好
complain of sth 诉说（病情或疼痛）；主诉
She left early, complaining of a headache. 她说自己头疼，很早就离开了。
17. convince v. 使信服 convincing adj.令人信服的
convince sb of sth 使某人相信某事
You will need to convince them of your enthusiasm for the job. 你要使他们相信你殷切希望得到这份工作。
convince that......
I am convinced that she is an optimistic girl.
18. in the possession of 为......所有（含被动意思，主语为物）
The land is in the possession of the businessman. 这块地为该商人所有。
in possession of 拥有，持有（含主动意思，主语为人）
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 don’t know or understand)
I got lost somehow. 不知怎么的，我迷路了。
以某种方式（in a way that is not known or certain)
We must stop him from seeing her somehow. 不管怎么着，我们都不能让他见到她。 somewhat 稍微，有点
The price is somewhat higher than I expected.
20. disturb v. 令人不安
The letter disturbed me.
disturbing adj. 令人不安的
disturbed adj. 感到不安的
surprising, surprised; exciting, excited.