Using LanguageⅡ第一课时教学实录

Unit 2 Cloning

Using Languages Teaching goals教学目标

1. Target language 目标语言

a. 重点词汇和短语

clone, commercial, producer, undertake, arbitrary, object, forbid, accumulate, cast down, object to, the media, in favour of b. 重点句子

It is a way of... The fact is that... The question that occurred ... 2. Ability goals能力目标

Enable the students to describe cloning: What is the advantages of cloning？

What is the problems or dangers of cloning？What is your opinion of cloning？

3. Learning ability goals 学能目标

Help the students learn how to describe cloning. Teaching important points 教学重点

How to describe cloning.

Teaching difficult points 教学难点

Help the students analyze the writing techniques of the article. Teaching methods 教学方法

Skimming, task-based method and debate method.

Teaching aids 教具准备

A recorder, a projector and some slides.

Teaching procedures && ways教学过程与方式

Step Ⅰ Warming up

The return of the dinosaurs? 1. Do you know anything about dinosaurs?

2. Have you ever seen the film Jurassic Park? Step Ⅱ Pre - reading Enjoy some pictures about dinosaurs.

霸王龙

Tyrannosaurus

剑龙

stegosaur Skimming Do the author believe the dinosaurs can be cloned? The writer of the text _________.

A. is excited by the possibility of cloning fierce and extinct animals

B. believes that extinct animals can be brought back to life by cloning C. thinks it impossible or unsuitable to clone extinct animals like dinosaurs

D. dreams of dinosaurs returning to the earth Detailed reading Answer the following questions: 1.

Why shouldn’t you clone an extinct animal if there isn’t enough diversity in the group?

There will not be enough genetic variation in the group to be able to resist

new illnesses.

2.

Why is it wrong to clone an extinct animal if it would live in a zoo?

It is not a good idea to clone an animal that would live in a zoo because it is not a suitable habitat to develop and increase its numbers. The zoo is not a natural environment for a wild animal. 3. Why can’t you clone the DNA of animals that have been extinct longer than 10,000 years? The DNA of animals more than 10,000 years old is not suitable for cloning, for it can’t survive so long.

Choose the best answers. 1. The film Jurassic Park is popular because _____.

A. people are interested in the subject of cloning

B. all the actors are dinosaurs

C. it was directed by a scientist who clones dinosaurs

D. it proves very interesting 2. Which of the following is true? ____ A. Mice were cloned in 1981. B. Dolly the sheep was the first cloned animal. C. The name of the cloned cow is “Bison”

D. China was successful in cloning mammals. 3. The reasons why a group of cloned animals all die of the same illness do NOT include ____.

A.they have the same arrangement of genes

B. there isn’t enough diversity in the

illnesses C. the illness is a new one group for it to overcome D. their arrangement of genes can not resist that new disease Fill in the blanks according to the text. Post-reading We can infer from the text that _____.

A. scientists are experimenting to clone dinosaurs B. dinosaurs will never return to the earth C. cloned animals will only live in the zoo D. the DNA of dinosaurs can only survive 10000 year Scientists are still experimenting with cloning mammals because they think it can make money. The animals that have disappeared from the earth, like dinosaurs, can be brought back to life through cloning. If we can clone any extinct animals, we should let them live in a zoo. Scientists are still experimenting with cloning mammals because they think it can make money. The animals that have disappeared from the earth, like dinosaurs, can be brought back to life through cloning. If we can clone any extinct animals, we should let them live in a zoo.

长难句解析

1. 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 people’s hearts.

在《侏罗纪公园》这部电影中, 有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。in which引导定语从句, how引导宾语从句。

3.

From time to time people suggest that extinct animals like dinosaurs, can possibly be brought back to life through cloning.

人们时常设想灭绝的动物, 例如恐龙,有可能通过克隆技术使它们复活。

from time to time 有时, 间或, 偶尔,= occasionally, now and then。

3. Diversity in a group means having animals with their genes arranged in different ways.

群中的多样性指的是拥有基因排列方式不同的动物。

with their genes arranged in different ways 作定语, in different ways 以不同的方式。

4. ... but others will survive and pass on the ability to resist that disease to the next generation.

...... 其他的将存活下来并传递给其后代抵抗这种病的能力。

resist 作及物动词主要有三个义项:抵抗, 对抗;

抵挡, 防止; (与cannot, could not连用)

无法抗拒, 无法抵挡。

4.

Based on what we know now, you cannot clone animals that have been extinct longer than 10000 years.

据我们现在所知, 绝种一万年以上的动物不能克隆。

base on/upon 以……为基础, 依据

其结构为: base sth. on/upon sth. is based on/upon Choose the right answer. 1. … proves how the idea

struck a mixture of fear and excitement into people’s hearts.

A. have sth. on the brain

B. confused C. droved people crazy

D. scared

2. People suggest that extinct animals like dinosaurs, can possibly be brought back to life. A. kept up

B. resist

C. live on

D. relived

3. The initial requirement is that you need perfect DNA. A. most thankful

B. most pressing

C. most difficult

D. most needed 4. All efforts of cloning an animal will be in vain if there is not enough diversity…

A. go to west

B. useless

C. helpless

D. meaningless 5. Others will survive and pass on the ability to resist that disease to the next generation. A. oppose

B. slide

C. hire

D. indicate 6. So the chance of dinosaurs ever returning to the earth is merely a dream. A. only

B. surely

C. abruptly

D. miserably Discussion May the best animal win!

Which extinct animals are worth restoring by means of cloning? Look for some information on the internet to help you and choose one of them to talk with your partner. Step Ⅳ Homework

Ask the students to do the following.

1. Complete the exercises on page 13. 2. Recite the key sentences in the text. 3. What is Clone? You might not believe it, but there are human clones among us right now.

Have you ever wished you could have a clone of yourself to do homework while you hit the skate park or went out with your friends?

Imagine if you could really do that. Where would you start?