高二英语人教版选修8教案：Unit2CloningPeriod5 Word版含解析

Unit 2 Cloning

Period 5 Reading，Speaking and Writing

整体设计

教学内容分析

The teaching materials of this period contain four parts.The first part is a reading passage，the text on Page 15 with the title of The Return of the Dinosaurs？It mainly talks about the possibility of cloning fierce and extinct wild animals，which always interests film makers and teenagers.The conclusion of the passage is：the chance of dinosaurs ever returning to the earth is merely a dream.

The second part is Reading Task on Page 58，which asks the students to read a passage about a debate and fill in the chart.By doing this，students will know what a debate is and how to organize a debate，which will be helpful in their future.

The third part is Speaking Task on Page 60，which asks students to organize a debate and deliver their speech.This activity will encourage the students to speak actively in class and develop their speaking and listening ability.It will also be helpful to their next task—writing.

The fourth part is Writing Task on Page 61.It asks students to write an article on a debate. 三维目标设计 Knowledge and skills

1．To enable the students to know the chance of cloning dinosaurs and some information about extinct animals. 2．To get the students to learn the following useful new words and expressions：strike，initial，vain，drawback，merely，decoration，adore，hatch，reasonable，strike...into one's heart，in vain，in good/poor condition，bother，be bound to do sth.，from time to time，bring sth./sb.back to life，resist.

3．To get the students to understand and use the following important and useful sentence pattern：

Besides that，there_is_also_a_fierce_debate_over the question whether human cloning experiments should be allowed.

4．To help the students develop their speaking and listening ability. 5．To help the students learn how to write an article on a debate. Process and methods

Reading for specific information，summarizing，discussing and practicing Emotion and value

1．To develop the students' sense of science.

2．To develop the students' sense of cooperation with others to solve problems. 教学重点、难点

1．The understanding of the reading passage.

2．The following key words and phrases：bother（打扰），be bound to do sth.（注定要做某事），from time to time（不时；偶尔），bring sth./sb.back to life（使……复活），resist（抵抗）

3．The important sentence pattern：Besides that，there_is_also_a_fierce_debate_over the question whether human cloning experiments should be allowed.

4．Teaching the students how to write an article on a debate.

教学过程

Step 1 Revision

Check the homework of the last period. Step 2 Lead-in

Show the students the following pictures on the slide and ask students the following questions：

1．Have you ever seen the film Jurassic Park? 2．Do you like dinosaurs?

3．Do you think it is possible to bring the dinosaurs back to life by cloning?

Step 3 Skimming

Skim the passage and answer the question：Is it possible to bring the dinosaurs back to life by cloning？Why?

Suggested answer：

It is impossible，because based on what we know now，you cannot clone animals that have been extinct longer than 10 000 years and dinosaurs disappeared 65 000 000 years ago.

Step 4 Scanning

Ask students to scan the passage and do the following exercises： 1．True or false?

（1）Scientists are still experimenting with cloning mammals because they think it can make money.

（2）Diversity in a group helps prevent animals from dying of the same illness. （3）Zoos are appropriate to cloned animals. （4）Scientists can only clone animals extinct 10 000 years ago. 2．Choose the best answer. （1）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 （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 twin calves.

（3）The reason 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 group for them to overcome illnesses C．the illness is too serious for all kinds of animals

D．their arrangement of genes can not resist that new disease （4）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 10 000 years Suggested answers： 1．（1）F （2）T （3）F （4）F 2．（1）C （2）D （3）C （4）B Step 4 Language study

Show the students the following language points in a slide show. 1．bother（P14）

【原句再现】

However，the problem that she later developed a serious lung disease bothered scientists. 但是，后来它得了严重的肺病，这使科学家们非常担心。 【观察探究】

（1）Don't bother Mary while she's reading.玛丽读书的时候不要打扰她。 （2）I don't want to bother you with/about my problems. 我不想让你因为我的问题而担心。

（3）Don't bother with/about that trifling matter.别为那件小事烦恼。 （4）You needn't bother to come to my office.你不必特地来我办公室。 （5）It bothers me that he hasn't been telling me the truth. 他一直没有对我讲真话，这让我很苦恼。

（6）I hate to be a bother，but could I use your phone? 给你添麻烦了，我可以用一下电话吗？

（7）Tom is a bother to his teacher.汤姆使他老师大伤脑筋。 【归纳总结】

bother vt.打扰；vi.操心；n.[U]烦扰；[C]令人烦扰的人和事 bother sb.（with/about sth.）（因某事）使某人烦恼/不安

bother with/about sth.因某事烦恼/不安；花费时间或精力做某事 bother to do sth.操心做某事

It bothers sb.that...使某人苦恼的是…… 【知识链接】

bother，disturb，trouble辨析

这三个词都表示“使人不得安宁”或“心烦意乱”。

（1）bother 指干扰别人的正常生活或工作而“使之不得安宁”，可能是故意的，含有使人讨厌的意味。

（2）disturb指使人失去正常秩序而一时得不到安宁，精力不能集中，语气比bother弱。 （3）trouble常指在心情上失去平静而感到忧虑、苦恼或在行动上带来不便，也常用于礼貌的请求。

【即景活用】

（1）我不能因自己那点小事去打扰他。 I can't ______ him ______ my trifling affairs. （2）我兄弟对母亲说话的那副模样惹我恼火。 The way my brother talked to Mother ______ me. Suggested answers：（1）bother；with/about （2）bothered 2．be bound to do sth.（P14） 【原句再现】

Dolly's death，like her birth，was_bound_to raise worries. 多莉之死，正如它的出生一样，注定要带来焦虑。 【观察探究】

（1）He's bound to notice your mistake. 他必定会觉察到你的错误。

（2）You are bound to do the work.你有义务做这工作。 （3）I am bound to mention it.我非提到这一点不行。 【归纳总结】

be bound to do sth.一定/注定会做某事；有责任或义务做某事 【知识链接】

（1）bound vi.“跳跃，跳起；弹回”。如： He bounded to his feet and waved good-bye to his friends.

他一跃而起，向朋友们挥手告别。

The ball bounded from the wall.球从墙上弹了回来。 （2）be bound up in sth.热心于某事；忙于某事

（3）be bound up with 与……有密切关系 【即景活用】 句型转换

（1）The weather is sure to get better tomorrow.

The weather ______ ______ ______ get better tomorrow. （2）She is busy with her homework.

She ______ ______ ______ ______ her homework. （3）We are closely connected with them. We ______ ______ ______ ______ them. Suggested answers：（1）is bound to （2）is bound up in （3）are bound up with 3．from time to time（P15） 【原句再现】

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

不时地会有人提议，克隆技术将有可能使地球上已经消失的动物（如恐龙）复活。 【观察探究】

（1）The car manufacturers changed the car models from time to time. 汽车制造商不时地改变车的型号。

（2）He went fishing from time to time.他不时去钓鱼。 【归纳总结】

from time to time 间或；有时；不时；偶尔 【知识链接】

表示“不时，偶尔”的词语还有：sometimes，at times，on occasion，now and then，occasionally，once in a while等。

【即景活用】 汉译英：

（1）他有时变得很不讲道理。

________________________________________________________________________ （2）那对夫妻有时吵架。

________________________________________________________________________ Suggested answers：

（1）He becomes unreasonable from time to time. （2）The couple quarrels from time to time. 4．bring sb./sth.back to life（P15） 【原句再现】

From time to time people suggest that extinct animals like dinosaurs，can possibly be brought_back_to_life through cloning. 不时地会有人提议，克隆技术将有可能使地球上已经消失的动物（如恐龙）复活。 【观察探究】

（1）The medicine can bring the dying back to life.这种药有起死回生之效。 （2）Flowers can bring a dull room back to life.鲜花能使沉闷的房间恢复生机。 【归纳总结】

bring sb./sth.back to life使复生，使恢复生机 【知识链接】

bring...back to life和come back to life辨析

bring...back to life的主语是别人，表示“使……苏醒/恢复”，而come back to life的主语则是自己，表示“苏醒/恢复过来”。

【即景活用】

It's reported that Israeli scientists have ______ a seed of more than 2000 years back to life recently.

A．sent B．brought C．given D．come Suggested answer：B