Period 2 Reading

Step 1 lead-in 1,It is a new techn ology which make an e___ copy of another animal and plant. xact The same,precise

2,Gardeners use it to make some c________plants. ommercial Buying and selling of goods

3,The p_______ of this technology need lots of time. rocedure Regular order or way of doing something

4,Dolly the sheep is a great b__________ in 1996 reakthrough Important development or discovery

Step 2: Warming up Rules: You will be provided with 5 or questions. Each time you give a wrong answer, you have to sit down, which means you are out. X

1.Cloning means making a copy of an animal or a plant. 2.Gardeners can make a lot of money by cloning plants. 3.Cloning animals is as complicated as cloni ng plants. X X

4. Dolly the sheep was the first successful clone of a mammal 5.Natural clones happen in animals as will as in plants.

Step 3: Prediction What do you think the article is about by reading this headline?

Step 4: Scanning ___.Cloning has two major uses. ___.Cloning is a way of making an exact copy of another animal and plant ___. The effect of Dolly. ___. It is forbidden to clone human beings. ___.The problems of Dolly

1,What is the main topic? A.Cloning. B.Dolly the sheep. C.It will lead us to some places. 2,What is the writing style? A. Expositive. B. Descriptive. C. Argumentative.

Problems or dangers of cl oning Advantages of cloning Animals may_______ _____ ________ of older a nimals. Medical cloning could ___ ____ ________ for serious degenerative( 变质 的）__ ________ in humans. develop theillnesses produce cures illnesses Step 5: Careful reading Read the text carefully then fill in the blank

Animal clones may _____ _ _________ than the donor animals Cloning plants can _____ _ _________ of similar ____ _____ ______ ______. ________ ________ may want to clone themselves. Cloning plants can be ___ ____ for research on ____ ___ ______ ________. There are ________ _____ _____ to cloning human b eings. Cloning can help save __ _________ _________. die younger produce plants quality for sale leader useful Evil plantspecies moral objections endangered animals new

Retelling Listen and fill in the blanks.

Cloning has always been with us and is here to stay. It is a way of making an ( 精确无 误 ) copy of another animal and plant. This happens in plants when gardeners take cuttings from gro- ing plants to make new ones, and when small parts of a plant are taken and grown in a laboratory. It also happens in animals when twins ( 完全 相同的 ) in sex and appearance are produced from the same original egg. The fact is that they are ( 自然的 ) clones of each other. Para. 1 exact identical natural

Cloning has two ( 主要的 ) uses.Firstly, gardeners use it all the time to produce________ ( 商 业 的 ) quantities of plants. Secondly, it is valua- ble for research on new plant species and for ( 医学 的 ) research on animals. Cloning plants is ____________( 简单 的 ) but the cloning of animals is more ( 复杂 的 ). The procedure is difficult to undertake, of course. At first it was not ( 精确 )enough and many attempts to c lone mammals failed. Para. 2 major commercial medical straightforward complicated accurate

But at last the determination and pati ence of the scientists was rewarded in 1996 with a breakthrough— the cloni ng of Dolly the sheep. The procedure works like this: 1 ( 雌性的 )sheep A provides an egg cel 2 The nucleus is removed from the egg cell. 3 The egg cell is ready for a new nucleus. Para. 2. Female

4 Female sheep B provides a ( 躯 体的 )cell for the clone. The nucleus of this cell contains all the genes needed to produce a new sheep. 5 The nucleus is taken out of the cell. 6 The nucleus from sheep B and the egg cell from s heep A are joined using electricity. 7 The cell divides and grows into an embryo. 8 The embryo is put into female sheep C. 9 The lamb is the clone of the ( 捐 献 的 )cell from sheep B which provided the nucleus. Para. 2 somatic donated

The ( 整 个 科 学 的 ) world followed the progress of the first ________( 成功的 ) clone, Dolly the sheep. The fact that she seemed to develop normally was very ( 令人鼓 的 ). Then came the ( 令人 烦扰 的 ) news that Dolly had become seriously ill. Cloning scientists were ( 沮 丧 的 ) to find that Doll’ys illness were more ( 恰 当 的 ) to a much older animal. Sadly the same ( 任 意的 )fate affected other species, Para. 3 whole scientific successful encouraging disturbing cast down appropriate arbitrary

Para. 3 such as cloned mice. The question that occurre d to the scientists was:” Would this be a major difficulty for all cloned animals?” Altogether Dolly lived fir six years, half the length of the life of the ( 原型的 ) sheep. Despite her problems, Dolly successfully produced a lamb in a natural birth. original

Para. 4 On the other hand, Dolly’s appearance raised a storm of objections and had a great impact on the ( 媒体和公 众 的 ) imagination. It became 有 争议 的 ). It suddenly opened everybody’s eyes to the possibility of using cloning to cure serious illnesses, and even producing human beings. media and public controversial

Para. 5 Newspapers told stories of evil leaders hoping to clone themselves and ( 宗 教 的 )leaders raised ( 道德的 ) questions. Governments became ( 紧张 不安 )and many forbade research into human cloning. Some countries such as China and UK continued to accumulate evidence of the ( 丰富的 ) medical aid that cloning could provide. However, scientists still wonder whether cloning will help or harm us and where it is leading us. religious moral nervous abundant

Step 6 Beautiful sentences ＊ It is a way of making an exact copy of another animal and plant. ＊ The fact is that they are natural clones of each other. ＊ Then came the disturbing news that Dolly had become seriously ill. ＊ However, scientists still wonder whether cloning will help or harm us and where it is leading us.

The development of cloning has more advantages to human beings or has more disadvantages to human beings Step 7: Extended discussion 论 坛论 坛 Topic:

Problems Animal clones may develop the illness of older animals. Animal clones may die younger than the donor animals. Evil leaders may want to clone themselves. There are moral objections to cloning human beings.

Advantages Medical cloning could produce cures for serious illness in huma ns. Cloning plants can produce plants of similar quality for sale. Cloning plants can be useful for research on new plant species. Cloning can help save endangered animals.

Step 8: Homework 1.Finish the composition 2.Review new words and useful expressions of the text. 3.Surf the Internet and find more information about cloning and share with your classmates.