1、返回目录 Cloning Unit 2 返回目录 Section Learning about Language&Using Language 返回目录 课前教材预案课堂深度拓展课末随堂演练目录Contents 返回目录 课前教材预案课文理解Choose the best answer according to the text.1What can we know about the writer from thetext?AHe is excited by the possibility of cloning fierceand extinct animals.BHe believes th
2、at extinct animals can be brought返回目录 CHe thinks it impossible or unsuitable to cloneextinct animals like dinosaurs.DHe dreams of dinosaurs returning to the earth.答案 C返回目录 2Why is the film Jurassic Park popular?ABecause people are interested in the subject ofcloning.BBecause all the actors are dinos
3、aurs.CBecause it was directed by a scientist who clonesdinosaurs.DBecause it proves very interesting.答案 A返回目录 3What do we know according to this text?AFrogs were cloned in 1981.BDolly the sheep was the first cloned animal.CThe name of the cloned cow is“Bison”DChina was successful in cloning mammals.
4、答案 D返回目录 4What can we infer from the text?AScientists are experimenting to clone dinosaurs.BDinosaurs returning to the earth is hardlypossible.CCloned animals will only live in the zoo.DThe DNA of dinosaurs can only survive 10,000years.答案 B返回目录 课文助读原 文THE RETURN OF THE DINOSAURS?The possibility of c
5、loning fierce and extinct wild animalshas always excited film makers.And they are not the only ones!The popularity of films such as Jurassic Park，in which a scientist clones several kinds of extinct dinosaurs,proves how the idea struck a mixture of fear and excitement into peoples hearts.返回目录 But in
6、 fact we are a long way from being able to clone extinct animals.Scientists are still experimenting with cloning mammals.This is because the cloning of mammals is still a new science and its story only began seriously in the 1950s as this list shows：1950s cloning of frogs1970s research using the emb
7、ryos of mice1979 work on embryos of sheep and mice返回目录 1981 first experimental clones of mice1983 first experimental clones of cows1996 first clone of a mammal:Dolly the sheep2000 cow gave birth to a bison2001 Chinas first cloned twin calves2002 first cloned cats2005 first cloned dog返回目录 From time t
8、o time people suggest that extinct animals like dinosaurs,can possibly be brought back to life through cloning.Unfortunately,with what we know now,this is eitherimpossible or unsuitable.There are many reasons.The initial requirement is that you need perfect DNA(which gives information for how cells
9、are to grow).返回目录 All efforts of cloning an animal will be in vain if there is not enough diversity in the group to overcome illnesses.Diversity in a group means having animals with their genes arranged in different ways.The advantage is that if there is a new illness some of these animals may die，b
10、ut others will survive and pass on the ability to resist that disease to the next generation.The great drawback21 to cloning a group of animals is that they would all have the same arrangement of genes and so might die of22 the same illness.Then none of them would be left to continue the species.返回目
11、录 It would be unfair to clone any extinct animals if they were to live in a zoo23.A suitable habitat would be needed for them to lead a natural life24.Based on what we know now25，you cannot clone animals that have been extinct longer than 10,000 years.Actually,dinosaurs disappeared 65,000,000 years
12、ago.So the chance of dinosaurs ever returning to the earth26 is merely27 a dream.返回目录 注 解extinct adj.灭绝的；消亡的 介 词 短 语 ofcloning 作 定 语，修 饰 Thepossibility。popularity n受人喜爱；流行strikeinto ones heart使刻骨铭心strike vt.&vi.(struck,struck)打；撞 击；罢 工 n罢工in which引导非限制性定语从句，修饰Jurassic返回目录 This is because这是因为，because
13、后接表原因的句子，在此引导表语从句。as this list shows是as引导的方式状语从句。现在分词短语using the embryos of mice作定语，修饰research。from time to time(相当于sometimes,not veryoften)不时；偶尔bring back to life 使复生；使复活返回目录 eitheror 或者或者；要么要么(连接并列结构)initial adj.最初的；开始的that引导表语从句，which引导定语从句，修饰DNA。in vain 白费力气；枉费心机vain adj.虚荣的；自负的；徒劳的diversity n差异
14、(性)；不同(点)；多样化mean doing sth意味着做某事返回目录 with their是 with 的复合结构，genes 与 arrange 之间为动宾关系。本句中 that 引导表语从句，在表语从句中包含 if 引导的条件状语从句。resist vt.抵抗；对抗pass onto 把传给；把转交给21 drawback n缺点；不利条件(常与 of/to 搭配)22 die of 死于(疾病、衰老等自身原因)返回目录 23 It would beif they were to live使用虚拟语气，表示与将来事实相反。24 lead a natural life 过正常的自然生活
15、25 过去分词短语 Based on what we know now 作状语。26 dinosaurs ever returning to the earth 是动名词的复合结构，置于 of 之后，构成 of 短语，作 the chance 的定语。27 merely adv.仅；只；不过(相当于 only)返回目录 译 文恐龙的回归？克隆凶猛和已灭绝的野生动物的可能性一直使电影制片商感到兴奋。然而他们并不是唯一对此感到兴奋的人！在侏罗纪公园这部影片中，一位科学家克隆了好几种不同的绝种恐龙。类似这样的电影很受欢迎，证明了这一想法使人们感到既兴奋又恐惧。但事实上，要想克隆绝种动物，我们还有很长
16、的路要走。科学家们现在还在进行克隆哺乳动物的试验。这是因为克隆哺乳动物仍然是一门新的科学，它是从20世纪50年代才真正开返回目录 20世纪50年代：克隆青蛙20世纪70年代：用老鼠胚胎进行研究1979年：对羊和老鼠的胚胎进行研究1981年：首次对老鼠进行实验性的克隆1983年：首次对奶牛进行实验性的克隆1996年：首次克隆哺乳动物(多莉羊)返回目录 2000年：奶牛生野牛2001年：中国首次克隆出双胞胎小牛2002年：首次克隆猫2005年：首次克隆狗不时地会有人提议，克隆技术将有可能使地球上像恐龙这样已经灭绝的动物复活。不幸的是，据我们现在所知，这要么是不可能的，要么是不合适的。其原因有很多：
17、返回目录 首先要求你有完好的DNA(它提供有关细胞将如何生长的信息)。如果某个动物群体没有足够的多样性以战胜疾病，那么克隆这种动物的所有努力都将是无用的。种群多样性是指种群中动物的基因以不同的方式排列。其优点是，如果发生了某种新的疾病，这类动物中的一些可能会死去，而另外一些却能存活下来，并且把这种免疫力传给下一代。返回目录 经过克隆的动物群体最大的缺点是：它们的基因排列有可能完全相同，因而它们有可能会死于同一种疾病。这样它们可能一个也留不下来繁衍后代了。任何已经灭绝的动物，如果克隆出来便要生活在动物园里，那将是不公平的。它们需要适当的栖息地过正常的自然生活。就我们现在所知道的而言，不可能克隆那
18、些已经绝种了一万年以上的动物。事实上恐龙在6 500万年以前就已经消失了。所以说恐龙回归地球的可能性仅仅是个返回目录(1)owe sb sth(owe sth to sb)欠某人某物oweto欠；把归功于owe it to sb that 把归功于某人owe sb a favour欠某人一个人情(2)owing to 因为/由于(常置于句首，to为介词)课堂深度拓展词汇点击owe vt.欠(账、钱、人情等)；归功于owing adj.拖欠的，未付的1 返回目录 Thanks for your help.I owe you a favour.谢谢你帮助我，我欠你一个人情。Owing to his
19、 absence,we had to put off the class meeting till next week.由于他不在，我们只好将班会推迟到下周。返回目录 考点训练单句语法填空(1)I must say I owe all the achievements _ theencouragementandhelpfrommycolleaguesandfriends.解析 句意：我必须说我所有的成就都应归功于我的同事和朋友们的鼓励和帮助。(2)We owe _ to Marconi and Bell that we cannow talk to the people on the othe
20、r side of the world.解析 句意：今天我们之所以能和远在地球另一端to it 返回目录(1)bother sb with/about sth因某事打扰/麻烦某人bother to do/doing sth费心做某事It bothers sb that/to do sth使某人苦恼/不安的是(2)put sb to bother给某人添乱get into a bother陷入麻烦bother vt.打扰；使(某人)烦恼(或担忧、不安)vi.操心 n烦扰；令人烦恼的事或人2 返回目录【提示】bother 作“麻烦；困难”讲时，是不可数名词；作“令人烦恼的事物”“讨厌的人”讲时，是
21、可数名词。It bothers me to think of her being alone in that big house.想到她孤零零地待在那个大房子里，我便坐立不安。He is really a bother,for he is always putting others to bother.他确实是个令人讨厌的人，总是给别人添乱。返回目录 考点训练单句语法填空(1)In this kind of highpressure situation,manyleaders bother their employees _ frequentmeetings.解析 句意：在这种重压下，很多领导
22、人频繁开会，让员工感到麻烦。(2)Whybother_(go)abroadtostudy,when there are so many good universities athome?with/about to go/going 返回目录 一词多义写出句中strike的含义(1)The workers were planning to go on a strike forhigher pay and better working conditions.罢工(2)Every one of visitors were struck by the splendidscenes of the Gre
23、at Wall.打动；迷住strike vi.&vt.(struck；struck/stricken)打；撞击；罢工；突然想到；打动；迷住；侵袭n罢工3 返回目录(3)The news came that the village was struck by atyphoon and the soldiers were sent there to help thepeople.侵袭返回目录(1)strikeinto ones heart使刻骨铭心 strike sb on/inthe身体部位 敲打某人It strikes sb that 某人突然想起be struck by被打动(2)be/go
24、 on strike在/举行罢工The death of her father struck sadness into her heart.父亲的离世使她伤心欲绝。返回目录 考点训练单句语法填空(4)A snowball struck him _ the back of thehead.解析 句意：一个雪球打中了他的后脑勺。(5)It strikes me as odd _ school children arerequired to come to school two hours before class.解析 句意：我突然觉得很奇怪，学生被要求在上课前两个小时到校。It strikes
25、sb that 某人突然想起。on that 返回目录(1)resist doing sth抵制做某事cant/couldnt resist/help doing sth忍不住做某事(2)be resistant to对有抵抗力；抵制resist vt.抵抗；对抗；抵制；忍耐resistance n抗拒；反对resistant adj.抵抗的；有抵抗力的4 Some government officials werent resistant to the temptation ofmoney,and were punished by law in the end.一些政府官员抵挡不住金钱的诱惑
26、，最后受到了法律的制裁。返回目录 考点训练单句语法填空(1)Astheysuppose,therehasbeenalotof_(resist)to this plan.解析 句意：正如他们所料想的那样，反对这个计划的人很多。(2)The body may be less _(resist)if itis cold.解析 句意：天气冷时，人体的抵抗力可能降低。resistance resistant 返回目录(3)I know it is time for me to set out to do myhomework,but I just cant resist _(play)computer
27、games.解析 句意：我知道是开始做作业的时候了，但我就是忍不住玩电脑游戏。playing 返回目录 be bound for sp前往某地be bound up with与密切相关(be)bound to(do)一定/注定(做)5 返回目录 考点训练单句语法填空(1)Although we cant say hard work is bound_(bring)success,efforts are never totally invain.解析 句意：虽然不能说只要努力就一定会成功，但努力是绝不会完全白费的。(2)When we were together and safe on a sh
28、ip bound_ North America,that was the best time of mylife.to bring for 返回目录 bringto life使苏醒；使更生动live/lead alife过着生活come to life变得活跃；苏醒过来lose ones life丧生bring back to life 使复活；使恢复生机6 返回目录 考点训练用life相关短语的适当形式填空(1)The birds are _ in song tosalute the new day.(2)Thecompanyisreportedto_ after the new manag
29、er isin power.(3)The newcome teacher really _ French_ for ing to life have been brought back to life brought to life 返回目录(1)vain adj.虚荣的；自负的；徒劳的(2)常见的“in名词”构成的介词短语：in turn 轮流；反过来in advance预先；提前in case万一；以防in vain 白费力气；枉费心机7 返回目录 in detail详细地in fact实际上in return作为回报in place在对的地方；在适当的位置返回目录 考点训练用“in名词”
30、结构短语的适当形式填空(1)I sent him a present _ for his timelyhelp.(2)Before you leave the office,everything should beput _.(3)As long as you have paid _，wewont charge you for delivery.(4)Write the phone number downyouin return in place in advance in case in vain 返回目录 out of condition 状况不好；身体欠佳on condition(tha
31、t)在条件下；倘若under/on no condition一点也不；决不(放在句首时，句子部分倒装)on this/that condition 在这种/那种条件下in good/poor condition 状况很好(坏)8【提示】condition指人或物自身的状况时，常用作不可数名词；指周围的环境、状况、条件时，常用复数形式。返回目录 写作提能句型训练(1)即使我们可能会一次又一次失败，但是我们决不会放弃我们的梦想。_even we may fail from time to time.(2)倘若每个人的行为举止都规矩得体，我们就可以构建一个和谐的社会。Wecanbuildaharmo
32、nioussociety.Under/On no condition will we give up our dreams on condition that everyone behaves himself 返回目录“with宾语宾补”结构句型解读1 句型公式Diversity in a group means having animals with their genes arranged in different ways.(教材 P15)群体的多样性是指这群动物的基因要以不同的方式排列。返回目录 点拨：本句中 with their genes arranged in different
33、 ways 是“with宾语宾补”结构。“with宾语宾补”结构常在句中作状语，表示伴随动作、方式、原因、条件或结果等，其结构和意义如下：with宾语(n./pron.)宾补现在分词表示主动、进行过去分词表示被动、完成不定式表示将来adj./adv./prep.表示状态返回目录 With everything bought,he left the market.买完了所有需要的东西之后，他离开了市场。The girl entered the room with her eyes full of tears.这个女孩满眼含泪地走进了房间。They cant move into the new h
34、ouse with it being painted.新房子正在粉刷，他们无法搬进去。返回目录【提示】with 的这种用法也适用于 without。He could not finish it without me to help him.(without代词动词不定式，表示条件)要不是我帮助他，他不能完成这件事。返回目录 考点训练单句语法填空(1)With so much homework _(finish),they cant play football this Sunday.解析 句意：有这么多作业要完成，这个星期天他们不能踢足球了。(2)Withoutanything_(leave)
35、inthecupboard,she went out to get something to eat.to finish left 返回目录 写作提能句式升级(3)随着母亲节的临近，我们决定举办一场家庭晚会来庆祝这个重要的日子。普通表达：Mothers Day is approaching.Wedecide to hold a family party to celebrate the importantday.高级表达：_，we decide tohold a family party to celebrate the important day(withWith Mothers Day a
36、pproaching 返回目录 2 The advantage is that 其优点是句型公式The advantage is that if there is a new illness some of these animals may die,but others will survive and pass on the ability to resist that disease to the next generation.(教材 P15)其优点是，如果出现了某种新的疾病，这类动物中的一些可能会死去，而另外一些却能存活下来，并且把这种免疫力传给下一代。返回目录 点 拨：本 句 中
37、The advantage is that 意 为“其 优 点是”，是由 that 引导的表语从句。类似的句型还有：The chance/chances is/are that 有可能The problem is that 问题是The drawback is that 缺点是The chance is that one smoker in four will die from smoking.每四个吸烟者中就可能有一人死于吸烟。返回目录 写作提能句型训练(1)汽车普及的缺点是它带来了如此多的空气污染。_thepopularityofcars_itbringsaboutsomuchairpol
38、lution.(drawback)(2)在大学住宿的优点是如果你有问题可以得到及时的帮助。_livinginuniversityaccommodationyou can get timely supportThe drawback of is that The advantage of is that 返回目录.选词填空(用方框中所给短语的适当形式填空)pass on,from time to time,give birth to,be basedon,bringback to life,experiment with1The old kindhearted man donated money
39、 tocharities _ though he didnt havemuch money.2 Toourgreatdelight,theboywas课末随堂演练from time to time brought back to life 返回目录 3Would you please _ the book to thenext person?4Asweknow,scientistsarestill_ cloning mammals.5Jocelyn expects _ a secondchild next year.6Judgment should _ facts,not onhearsay(
40、道听途说)pass on experimenting with to give birth to be based on 返回目录.句型训练1你付出了这么多努力，一定会通过这次的考试。(bound)Youvemadesomucheffortsthatyou_ _.2但是问题是越来越多中学生沉溺于网络。(that引导的表语从句)But_moreandmoremiddle school students are addicted to the Internet.are bound to pass the exam the problem is that 返回目录 3他再次上课迟到让老师很生气。(动
41、名词作主语)_ made theteacher very angry.4我的朋友Lily给我发了一封邮件，里面有一些她在丽江拍的照片。(with的复合结构)MyfriendLilysentmeanemail_ _.His being late for the class again with some pictures taken in Lijiang in it 返回目录 5你可以借我的书，条件是你把它保存好并且按时归还。(condition)Youmayborrowmybook_.on condition that you keep it well and return it on tim
42、e 返回目录.短篇表达昨天王教授给我们做了一个关于克隆(cloning)的讲座。他的报告不时地(from time to time)被我们的掌声打断。他说多莉羊的克隆成功，应归功于(oweto)先进的技术。当有人问及我们能否通过克隆技术使地球上灭绝的动物复活(bring back to life)时，王教授说人类不能(unable)做到这一点。我们可以说这种努力是徒劳的(invain)。因此恐龙的回归仅仅(merely)是个梦而已。返回目录 Yesterday Professor Wang gave us a lecture oncloning.His report was interrupt
43、ed by our applausefrom time to time.He said the successful cloning of Dollythe sheep should be owed to the advanced technology.When people asked whether we could possibly bringextinct animals back to life through cloning,ProfessorWang said human beings were unable to do this.Wecould say these efforts were in vain.So the dinosaursreturning to the earth is merely a dream.返回目录 课后限时作业(六)