Cloning学案5.doc

1、Teaching aim:掌握科普文章的阅读方法Teaching key points and difficulty动名词的复合结构学习过程：Step 1: Choose the best answer after reading.1.The film Jurassic Park is popular because _. A. people are interested in the subject of cloning B. all the actors are dinosaursC. it was directed by a scientist who clones dinosaursD

2、. it proves very interesting2.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 cloningC. thinks it impossible or unsuitable to clone extinct animals like dinosaurs D. dreams of dinosaurs ret

3、urning to the earth3. We can infer from the text that_ A. scientists are experimenting to clone dinosaursB. dinosaurs will never return to the earthC. cloned animals will only live in the zooD. the DNA of dinosaurs can only survive 10 000 yearStep 2: Read the text, then tell the following sentences

4、are true or false. 1.Scientists are still experimenting with cloning mammals because they think it can make money.2.The animals that have disappeared from the earth, like dinosaurs, can be brought back to life through cloning.3.If we can clone any extinct animals, we should let them live in a zoo.St

5、ep 3: Give some reasons why it is either impossible or unsuitable to clone extinct animalsReason 1:Reason 2:Reason 3:Step 4: Diversity in a group of cloned animalsAdvantage of diversityDisadvantage of diversityStep 5:knowleage points1. strike1)撞；碰；撞击；碰撞She fell, striking her head against the side of

6、 the boat.她摔倒时头撞在船舷上。 2)打；击One man was struck on the head with a stick.一名男子头部遭到棍击。 3)击打，踢 (球等 )He struck the ball into the back of the net.他射出的球直入网底。 4)(想法，念头)突然想到；一下子想起；猛地意识到An idea suddenly struck me.我心中忽然产生了一个念头。It suddenly struck me that we ought to make a new plan.5.be struck by/on/with sb/sth

7、被某人(或某物)打动；迷恋某人(或某物)I was struck by her beauty.她的美貌给我留下了深刻的印象。 6)(疾病，灾难)侵袭；爆发The area was struck/hit by an outbreak of cholera.那一地区爆发了霍乱。 7)(钟)敲，鸣，报时The clock struck nine.钟敲了九下。8)罢工The workers were striking because they wanted more money.工人们在罢工，因为他们要求增加工资。9)擦，划 (火柴 )；击出火星The matches were damp and he

8、 couldnt make them strike.火柴受潮了，他划不着。10) on strike 在罢工Most of the employees were on strike.许多雇员在罢工。11) strike.into ones heart 使刻骨铭心The ghost story struck fear into the hearts of the children.那个鬼故事使孩子们心惊肉跳12)Strike while the iron is hot. 趁热打铁He should strike while the iron is hot.他应该趁热打铁。【运用】(1).Very

9、 often, it_ me that I have left the key indoors when Im about to lock the door.A. strikes B. reminds C. occurs D. mentions(2).Audiences and critics were _by its originality, vitality, and excitement of the Beijing Olympic opening ceremony.Ahappened Breflected Coccurred Dstruck(3).It was a bitter swe

10、et moment, only her family and few close friends knew that Engrid had been _with the cancer the year before.Aknocked Bstruck Cbeat Dhurt3in vain 枉费心机；徒劳无益；白费力气They tried in vain to persuade her to go.他们极力劝说她去，但枉费了一番口舌。All our efforts were in vain.我们所有的努力都付诸东流。(1) His efforts to raise money for his p

11、rogram were_ because no one showed any intention to take a cent out of their pockets.Ain place Bin sight Cin effect Din vain(2)We tried_ to make him change his mind.Ain public Bin returnCin vain Din turn3. So the chances of dinosaurs ever returning to the earth is merely a dream!所以说恐龙回归地球的可能性仅仅是个梦想罢

12、了！dinosaurs ever returning to the earth 为“动名词的复合结构”。动名词带上自己的逻辑主语，就构成了动名词的复合结构。其逻辑主语一般由物主代词、名词所有格、人称代词的宾格和名词来充当。Would you mind my/me opening the window?我打开窗子你介意吗？He insisted on his sons/his son going to college.他坚持让他儿子上大学。(1) It is difficult to imagine his _the decision without any consideration.Aacc

13、ept Baccepting Cto accept Daccepted(2) Victor apologized for_ to inform me of the change in the plan.Ahis being not able Bhim not to be ableChis not being able Dhis to be not able(3) The discovery of new evidence led to_.Athe thief having caught Bcatch the thiefCthe thief being caught Dthe thief to

14、be caught(4)Our English teacher_ our buying a good English Chinese dictionary.Aasked Bordered Csuggested Drequired课堂练习1. They will be able to look for plants with the right qualities to _new diseases and the effects of climate change.Aresist Bboycott Crefuse Dreject2. They looked so beautiful in the

15、 moonlight that the soldier could not resist _one with him for memory. A. to have taken Bto takeCtaking D being taken3. What worried the child most was _to visit his mother in hospital.Ahis being not allowed Bnot allowed Chis not being allowed Dnot allowed4. They tried in every way they knew to brin

16、g her back to _， but _.Aenergy; in vain Blife; in vainCenergy; in short Dlife; in short5.Painters and workers had to be very careful when they were trying to bring the city back to _.Aappearance BconstructionCatmosphere D life6. It was _that we tried to find his mother.Ano doubt Bin vain Cno wonder

17、Da pity7.But now, particularly, when we are faced with so many difficulties, _is a blow（打击） most terrible to bear.Ahis not being with us Bhis being not with usChim not to being with us Dhis to be not with us8.Her parents objected to _ that farmer , though he was very rich.A. she married B. her to marry C. marry D. her marrying 9. She is too fat, but she cant _ sweets.A. remove B. resist C. reject D. object10. Do you often go to the movies at weekends? Not often, I only go to the cinema _.A. at one time B. for a time C. at a time D. from time to time