Using LanguageⅡ第二课时教案

高中英语选修八Unit 2 Cloning Period 2 learning about Language (1)教学设计

洪湖市第二中学侯君涛

Teaching Goals:

1. To enable Ss to master key phrases and expressions. 2. To enable Ss to learn how to use these words and expressions. Teaching Procedures:

Step 1. Language study

Purpose: To train Ss’

listening ability and language capacity. 1. Listen to the text and deal with the language points in pairs. Match Column A with Column B Column A Column B (1) straightforward A. having a sign of illness of the mind or the feelings (2) disturbed B. entirely; in all; considering all things (3) altogether C. easy to do or understand (4) forbid D. make oneself responsible for; promise (5) undertake E. not on reason (6) arise F. not allow (7) arbitrary G. become evident; appear Suggested Answers:

(1) C (2) A (3) B (4) F (5) D (6) G (7) E

2. Ss are divided into small groups and have a discussion. Find out difficult words and expressions and write the words and expressions on a piece of paper.

3. Get Ss to display their papers by projector and tick out the most useful words and expressions. differ from undertake to do sth cast down be appropriate to object to have/make a strong/great impact on be bound to on the assumptions that 4. Explain some important sentences for Ss. (1) It also happens in animals when twins identical in sex and appearance are produced from the same original egg. (2) Cloning scientists were cast down to find that Dolly`s illnesses were more appropriate to much older animal. (3) Altogether Dolly lived for six years, half the length of the life of the original sheep. (4) On the other hand, Dolly` appearance raised a storm of objection and had a great impact on the media and public imagination.

(5) Some countries such asChinaand theUKcontinued to accumulate evidence of the abundant medical aid that cloning could provide. 5. Explain some important words for Ss. (1) happen vi (偶然地)发生；出现

Page11.line2 and page 12.line5 辨析：happen, befall, occur, take place与come about happen, occur, befall, take place, come about五词都有“发生”之意，但有区别。

happen 使用最广，有偶然发生之意。

Befall 指灾祸等的发生或出现。多用于书面语，并且往往暗示命运的作用。

occur 用法较正式，既可以指自然发生，也可以指有意安排。可用于具体的事物，也可用于抽象的事物。用于指具体事物时，可与happen 互换（但happen 后接不定式时，不能与occur互换。该词有“想起”的意思，这时不可同happen互换

take place 常可与happen, occur互换

( 以具体事物作主语时)，但较多地指有计划，按事先安排的进行的含义。引申用法可表示举行、进行的意思。

come about 往往注重事情发生的原因，常与how 连用。

注：以上五词均为不及物动词，无被动语态。

(2) disturbing (page 12 line2) 烦扰的

I`ve had some disturbing experience. ●

拓展：disturb 打扰、使焦灼不安、扰乱

I’m sorry to have disturbed you. The dream so disturbed him that he could not sleep. A light wind distured the surface of the water. (2) cast down (page12 line3)（多用于被动结构或作表语）沮丧，低沉，泄气

Anyone would be cast down by such news as that. He seemed cast down as a result of his failure to find work. He was very downcast when he got the exam results. (3) raise (page 12 line8) 举起，使起来，唤起，提高，筹款，养育

●

拓展：rise vi 起立，升起，上涨，高耸，起义

Step 2. Consolidation.

Purpose: To consolidate the words and phrases in the text. 1.

1. Ask Ss to complete the following sentences using suitable words or phrases

(1) Chinese ______ greatly _____ French in pronunciation. (2) He ______ to finish the job by Friday. (3) Many people ______ experimentation on animals. (4) You are not legally ______ ______answer these questions. (5) It took them three years to ______ ______ the debt. (6) A new oil crisis has ______. (7) Anyone would be______ ______ by news such as that.

Suggested Answers:

(1) differs…

from (2) undertook (3) object to (4) bound to (5) pay off (6) arisen (7) cast down 2. Ask Ss to finish Ex3 on P13 and check the answers in pairs.

3. Ask Ss to fill in the brackets to complete the passage below. Then let some Ss present their answers. Many challenges must be overcome_____(1)___(连词) "cloned organ" transplants become reality. More effective technologies for creating human embryos, harvesting stem cells, and producing organs____(2)_____(介词) stem cells would have to be ___(3)_____ (develop). In 2001, scientists with the biotechnology company Advanced Cell Technology (ACT) reported_____(4___(连词) they had cloned the first human embryos; however, the only embryo to survive the cloning process stopped developing___(5)____ (介词) dividing into six cells. In February 2002, scientists with the same biotech company reported that they had ___(6)_____(success) transplanted kidney-like organs into cows. The team of researchers created ___(7)___(冠词)_cloned cow embryo by removing the DNA from an egg cell and then injecting the DNA from the skin cell of the donor cow's ear. Since little is _____(8)____(短语动词)manipulating ( 控制) embryonic stem cells from cows, the scientists let the___(9)_____(clone) embryos develop into fetuses. The scientists

then harvested fetal tissue from the clones and transplanted it into the donor cow. In the three months of observation ___(10)_____the transplant, no sign of immune rejection was observed in the transplant recipient.

Suggested Answers:

(1) before (2) from (3) developed (4) that. (5) after (6) successfully (7) a (8) known about (9) cloned (10) following Step 3. Homework

1. Ask Ss to review the language points in this period. 2. Ask Ss to finish the following exercises. (1) Ask Ss to use “happen, occur, befall, take place, come about”

to fill the following blanks. ①

When did the accident_________? ②

Our school sports meeting will ________ next week. ③

How did the quarrel __________ ? ④

It ________ to me that Mary knew him very well. ⑤

He ________ to be out when I called. ⑥

Bad luck and ill health ____on them through out his life. Suggested Answers:

①

happen ②

take place ③

come about ④

occurred

⑤

happened ⑥

befell (2) Ask Ss to use “raise”

or “rise”

to fill the following blanks:

①

The Chinese people have ________ to their feet. ②

Heavy rains ________the river stage. ③

The government is trying to ________ the living standard of the working people. ④

His voice ________ in excitement. ⑤

The wind is ________. ⑥

Where was he _______? Suggested Answers:

①

risen

②

raised ③

raise ④

rose ②

⑤

rising ⑥

raised