高中英语：Unit2 Cloning 知识点讲与练人教版选修8

book 8 unit 2 cloning warming up and pre-reading一.背景阅读cloning is the technique of producing a genetically identical duplicate of an organism . a clone is said to be all descendants derived a sexually from aIn fact，in our daily life，this happens often.for example，Gardeners take cuttings from growing plants to make new ones。you often see that your mother picks a small branch from a growing plant to make a new o Ne。If she likes this kind of flowers，She can do cloning . cloning also happens in animals or human beings when twins identical in sex and appearance arrancethe fact is that cloning plants is straight forward but the cloning of animals is more complicated .The possibility of human cloning，raised when Scottish scientists at Roslin institute created the much-celebrate d sheep dolly she was the first mammal to be cloned From adult DNA taken From an adult cell .Previously，Animals had only been cloned using embr ryo cells which already have the potential to become a complete embel ryo in its own right。the big break through wi Th dolly was to make a clone from an ordinary，adult cell in this case from a female goat s udder。1.fill in the blanks according to the passage。1) The definition of cloningcloning is a _ _ _ _ _ _ _ _ _ of producting a geneticly duplicate of an animal or a plant . it happens both in _ _they can be clon Ed by _ _ _ _ _ _ or humans。the former is _ _ _ _ _ clone while the later is man-made clone。2)how does dolly differ from other sheep？she was _ _ _ _ by humans while the others were born natural lly。所以，dolly was a _ _ _ _ _ _ sheep。2.Discuss the following questions。1)。can you see any cloning happen in our daily life？2)。what benefits can humans gain from cloning？3)。what problems may arise when humans are cloned？4)。Should we clone a human？5)。could cloning replace sex as the means of creating new human life？6)。could a parent clone a child who is dying of a terminal illness？ReadingI. Reading comprehension:1.The main idea of the text is_A.animal cloning is very valuable and can benefit the world。B.animal cloning could be misused by bad people so it must be forbidden。C.animal cloning is well developed because dolly the sheep was born。D.animal cloning raised arguments and scientists are not sure about its future。2.the cloning of dolly the sheep succeeded because _ _ _ _ _ a . its easier to clone a sheep than other animals b . the scientistsC.the scientists were reward and got lots of moneyD.many other attempts to clone mammals failed3.what is the writer s attitude toward cloning in this passage？A.The writer is against cloning。B.The writer is in favor of cloning .C.the writer is neutral towards cloning。D.the writer is in agreement with cloning。4.which of the following is not an advantage of cloning？A.cloning can be used for medical purposes。B.large quantities of food can be producted by cloning。C.cloning can help keep animals from beoming extginct。D.people can clone themselves at will。5.我们的can infer from the last three paragraphs that _ _ _。A.the normal development of dolly had no effect on the cloning of other species .B.dolly s serious disease and final death disturbed the whole world .C.dolly successfully cloned a new lamb with the help of cloning scientists。D.there were arguments about animals about animal cloning and concerns about the future of cloning。6.What is the writing style？A.Expositive(说明)B.DescriptiveC.Argumentative(议论)D. Narrative二.fast reading : true or false questions1.cloning means making a copy of an animal or a plant。2.gardeners是make a lot of money by cloning plants .3.cloning animals is as complicated as cloning plants。4.dolly the sheep was the first successful clone of a mammal。5.natural clones happen in animals as well as in plants。三.fill in the chart using the information from the text。add one reason of your own in each column。Problems or dangers of cloningAdvantages of cloningAnimals may _ _ _ _ _ _ _ _ _ of older animals。medical cloning could _ _ _ _ _ _ _ _ _ _ _ _ for serious degenerative。Animal clones may _ _ _ _ _ _ _ _ _ than the donor animalsCloning plants是_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ of similar _ _ _ _ _ _ _ of_ _ _ _ _ _ _ _ _ _ _ _ _ _ may want to clone themselves。Cloning plants是be _ _ _ _ _ _ _ _ _ _ _ for research on _ _ _ _ _ _ _ _ forthere are _ _ _ _ _ _ _ _ _ _ _ _ _ to cloning human beings。cloning can help save _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _。.Writing把课文的内容概括为约30个单词，然后按照以下要求写一篇文章。内容：1.人们对复制的看法2.你对克隆的看法。请求：字数：12标题自己编_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _._ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _._ _ _