Question

2．Do you know about Dolly，a famous sheep？She was created by cloning more than ten years ago in Scotland．Cloning is famous throughout the world．It is an experiment to make an animal that is exactly like its parent．So far，scientists have cloned rabbits，sheep，cows，mice，pigs and some other animals．
But what is used in cloning？It's DNA．There is DNA in most living things，including human beings．Your DNA is the same in every part of your body．For example，your fingernails have the same DNA as your hair．You have your own DNA，which is similar to your parents'，but not exactly the same．However，Dolly's DNA is exactly the same as that of the sheep she was cloned from．
No doubt cloning can help save those animals in danger．And it can also benefit human beings．The cloning technology has been used in human organs．With its help，scientists are able to explore more ways to treat many serious diseases such as heart disease，AIDs and cancer．However，cloning could be used in some ways to harm society．All governments should make laws to make sure it can be used properly．
51．When and where was Dolly created？C
A More than one hundred years ago，in the USA．
B．More than fifty years ago，in Scotland．
C．More than ten years ago，in Scotland．
D．More than fifty years ago，in China．
52．According to the passage，which one hasn't been cloned by scientist？D
A．cows           B．mice         C．rabbits             D．giraffe
53．Which of the following is true according to the passage？C
A Cloning is an experiment to make an animal that is different from its pare nt．
B．Your our fingernails don't have the same DNA as your hair．
C．Your DNA isn't exactly the same as your parents．
D．Cloning won't be used in any ways to harm society．
54 The cloning technologyB
A is not famous throughout the world．
B．has been used in human organs．
C．has been used properly．
D．is useless．
55．The best title for passage isD
A Dolly         B．Society      C．DNA　        D．Cloning．

Answer 1

分析 克隆羊Dolly，是在十几年前在苏格兰克隆的．至今科学家已经克隆了兔子，羊，牛，老鼠和猪其他动物．但是怎样克隆的呢？大部分生物有DNA，包括人，人身体的每个部分的DNA都是一样的，你有自己的DNA，和你的父母相似，但不是一样 的，然而，Dolly的DNA和那个被克隆的羊的DNA是一样的．
毫无疑问克隆能帮助拯救那些处于危险的动物，人类也能获益．克隆技术已经用来克隆人体器官了，科学家能开发更多的拯治很多严重疾病的方法，例如心脏病，艾滋和癌症．然而，克隆也会有危害，政府应该制定法律来使克隆技术正确地用．

解答 51．答案：C．细节理解题．从文章的第一段She was created by cloning more than ten years ago in Scotland可知是在十几年前在苏格兰克隆的．故选C．
52．答案：D．细节理解题．从文中的第一段So far，scientists have cloned rabbits，sheep，cows，mice，pigs and some other animals．可知没有克隆长颈鹿．故选D．
53．答案：C．细节理解题．从文中的第二段Dolly's DNA is exactly the same as that of the sheep she was cloned from．可知克隆是和被克隆本身是一样的DNA故A错，结合For example，your fingernails have the same DNA as your hair可知你的指甲和头发的DNA一样，故B错，结合最后一段However，cloning could be used in some ways to harm society可知克隆也会对社会有害，故D错，结合第二段You have your own DNA，which is similar to your parents'，but not exactly the same可知，你的DNA不完全跟你父母一样．故选C．
54．答案：B．细节理解题．从文中的最后一段The cloning technology has been used in human organs可知，克隆技术已经被使用在人体器官．故选B．
55．答案：D．标题判断题．本篇文章主要介绍说明克隆技术．怎么克隆的，克隆的利弊，故选D．

点评 在做阅读理解时，可遵循三部曲的原则，即：快速阅读短文；认真逐题作答；复查校对答案．