课程内容
高中英语《克隆 Unit 2　Cloning（Part 1）》（选修8）
Warming up
How much do you know about cloning
What's cloning?
Cloning is a way of making an exact copy of another animal and plant.
It happens in animals as well as in plants.But cloning plants is straightforward while cloning animals is very complicated.
What are Cones divided into?
Cones are divided into two:
natural clones and man-made clones
Natural clone is one that occurs in a natural form of cloning without human beings' help.
Man-made clone is one that is produced through human beings's intervention(介入）.
Which of the following clones are natural,and which are man-made?
Write the letter"T" if the statement is true.
Write "F"if it is false.
1.Cloning means making a copy of an animal or a plant.(F)
2.Gardeners can make a lot of money by cloning plants.(T)
3.Cloning animals is as complicated as cloning plants.(F)
4.Dolly the sheep was the first successful clone of a mammal.(T)
5.Natural clones happen in animals as well as in plants.(T)
Language points
1.differ vi.不同；相异；不同意
那就是我们意见不同之处。
That's where we differ.
搭配：differ in...     在...方面不同
differ from...    与...不同
differ from/with sb. about/on sth.   在某方面与某人不同
我们的意见在那个方面有很大的出入。
用介词from.with,in,on.about,upon填空
(1)The two girls differ (in)language.
(2)The customs here differ (from)those of the south.
(3)I differ (from/with)him (on about)the plan.
2.undertake  vt.着手做；从事；承担；保证
她为新变化承担全部责任。
She undertook full responsibility for the new changes.
undertake to do sth   保证做某事
他答应星期五之前完成这项工作。
He undertook to finish the job by Friday.
(1)They (undertook an important project)(承担了一个重要项目）last year.
2)We will (undertake a journey)(去旅行）next week.
3)She (undertook to pay back)(答应偿还）the money within three months.
1.What do you think is the right person to (B)the task?
A undergo   B undertake     C understand    D underline
【解析】undertake the task 表示“承担任务”为固定搭配，A、C、D均不与the task构成有意义的词组。
3.cast vt.扔；投；掷  (cast,cast)
cast sb down   使沮丧
be cast down    感到沮丧
cast a net   撒网
cast a vote   投票
cast sb. into prison   把某人投进监狱
cast...on/at   把（光、视线等）投向....
他向那妇人看了眼
He cast his eyes at the woman.
完成句子
(1)The thief (cast down the wallet)(丢下了钱包）and ran away.
(2)Don't be (cast down)(垂头丧气），try agagin.
(3)Hearing the news,he (was cast down)(很沮丧）.
4.pay off  得到好结果，取得成功；偿清
你的计划成功了吗？
Did your plan pay off?
他们三年才还清欠债。
It took them three years to pay off the debt.
辨析pay for,pay back与pay off
(1)pay for 表示“付...的钱”
她买那个戒指花了两百美元。
She paid 200dollars for that ring.
(2)pay back 偿还；报复
你能借给我10英镑吗，我星期五就还你。
Can you lend me $10?I'll pay you back on Friday.
他不来，以此来报复我。
He paid me back by not coming.
运用用pay构成的短语完成句子
(1)pay for  为....付款/付出代价
(2)pay back   偿还，回报
(3)I'll pay you back (还你钱）next week.
(4)I have paid for (已付了钱）the car.
(5)You must pay for(为...付出 代价）your rude words.
(6)She paid 100 yuan for Tom's bike.(花100元买了汤姆的自行车）
（7）His efforts paid off(他的努力没有白费）when the girl accepted his proposal.
(8)-Li Fei won the first prize in the national English competition.
-Oh,really?I'm glad that her efforts at last(C).
A worked out     B got back    C paid off   D turned out
【解析】下句意为“我很高兴她的努力最后获得回报”，pay off （指冒风险的政策、做法等）带来好结果，成功，行得通。又如：The gamble paid off.赌赢了。
4.object  vi.反对；不赞成（常接介词to)
We object to being treated like this.
我们抗议这种待遇。
I objected that he was too young for the position.
我提出反对意见他太年轻不适合这个职位。
objective  adj.客观的，不带偏见的
用object的适当形式填空
(1)He didn't mean to (object)to my proposal.
(2)His idea is reasonable and (objective).
objection  n.反对；不赞成
have/take/make an objection to(doing)sth.
对...表示反对
raise an objection to sth.对...提出异议
我反对该计划的主要理由是它费用太高。
My main objection to the plan is that it costs too much.
We (B)to punishing a whole group for one person's fault.
A complain      B object     C oppose   D resist
【解析】考查动词辨析。句意为：我们但对因为一个人的过失而去惩罚所有的人。complain 抱怨，悲叹，控诉；object反对,object to doing 反对做....；be opposed to=object to 反对；resist 抵抗，反抗，忍得住
5.obtain   vt.获得；赢得
搭配  obtain sth. from....    从....获得....
obtain sth. through...    通过（某种方式或手段）获得
根据汉语意思完成英语句子
（1）上网是我的爱好之一，我能从网上获取很多知识。
Surfing on the Internet is one of my hobbies and I can (obtain much knowledge from)it.
(2)追求幸福是每个人的共性，但获得幸福的手段是各不相同的。
All people are driven to pursue happiness in life,but the ways through which we obtain happiness are different.
6.accumulate  v.积累，聚集
He accumulated large fortune by hard work.
他因努力工作而积蓄了一大笔财富。
accumulated energy(strength)
积聚的能力（力量）
accumulated evidence (debts)
越来越多的证据（债务）
完成句子
(1)He quickly (accumulated large fortune.)
积蓄了一大笔财富
(2)Clouds began to (accumulate in the sky).
在天空中聚集。
Homework
1.Review the language pints.
2.Go through the text;Cloning