Unit 2 Cloning Section Ⅰ Warming Up &；Reading-Pre-reading
Have you ever wished you could have a clone of yourself to do your homework while you went out to play with your friends? Imagine if you could really do that, where would you start?
What exactly is cloning?
Cloning is a way of making an organism (有机体) that is an exact genetic (基因的) copy of another. This means that every single bit of DNA is the same between the two!
You might not believe it, but there are human clones among us right now. They weren't made in a lab, though. They're identical (同样的) twins, created naturally. Below, we'll see how natural identical twins relate to modern cloning technologies.
How is cloning done?
You may have first heard of cloning when Dolly the sheep showed up on the scene in 1997. Cloning technologies have been around for much longer than Dolly, though.
How does one go about making an exact genetic copy of an organism? There are a couple of ways to do this：artificial embryo twinning (人工胚胎双生) and somatic cell nuclear transfer (体细胞核移植). How do these processes differ?
1．Artificial Embryo Twinning
Artificial embryo twinning is the relatively lowtech version of cloning. As the name suggests, this technology mimics the natural process of creating identical twins.
2．Somatic Cell Nuclear Transfer
Somatic cell nuclear transfer (SCNT), uses an approach different from artificial embryo twinning, but it produces the same result: an exact clone，or a genetic copy, of another. This was the method used to create Dolly the sheep.
Section_Ⅰ Warming Up & Reading — Prereading
CLONING：WHERE IS IT LEADING US?
Cloning has always been with us and is here to stay. It is a way of making an exact① copy of② another animal or plant. It happens in plants when gardeners tattings③ from growing plants to make new ones. It also happens in animals when twins④ identical⑤ in sex and appearance are produced from the same original egg. The fact is that these are both examples of natural clones⑥. ①exact/Iɡ'zækt/adj.精确的；准确的
②make a copy of (＝copy)复制
of making ...作way的定语。
⑥The fact is that ...中，that引导表语从句。
Unit 2 Cloning Section Ⅱ Warming Up &；Reading-Language Points
1.differvi.不同；相异→different adj.不同的；与众不同的→difference n．差异；区别→differently adv.不同地
2.undertakevt.着手；从事；承担→undertook (过去式)→undertaken (过去分词)
7.accumulatevt. &vi.积累；聚积→accumulation n．积累 1.“承担”种种
②undertake job 承担工作
③undertake mission 承担使命
④undertake task 承担任务
⑤undertake a post 担任职务
①breagh→breagh n. 突破
②breat→outbreak n. 爆发
③break down→breakdown n. 故障；(关系)破裂
④fall down→downfall n. 垮台
⑤put out→output n. 产量；输出
⑥get together→gettogether n. 聚会
[同义] entirely, wholly, totally, completely, thoroughly, all
[反义] partially, partly
①accumulate vt. &vi. 积累；聚积
②increase vt. &vi. 增长；增加；提高
③enlarge vt. &vi. 扩大；放大
④expand vt. &vi. 扩大；膨胀
⑤shrink vt. &vi. 收缩；缩小
⑥reduce vt. &vi. 减少
8.in_favour_of 赞成；支持 1.growing plants 生长着的植物
2.natural clones 自然克隆
3.new plant species 新植物物种
4.the disturbing news 令人不安的消息
5.become seriously ill 患重病
6.cloned animals 克隆动物
7.raise a storm of objections 引起了一阵强烈的反对
8.opened everybody's eyes 打开了人们的眼界
高考提能练 Unit 2 仿真检测灵活拆组卷
第一部分 听力 (满分30分，限时20分钟)
1．What does the man mean?
A．It's not surprising the milk smells bad.
B．The woman is just joking.
C．They need to replace the refrigerator.
2．What does the woman suggest?
A．Taking a walk in the rain.
B．Putting off their picnic.
C．Going on a picnic.
3．How does the man like the car?
A．It is extremely nice.
B．It is cheap.
C．It is not satisfactory.
4．What are the speakers doing?
A．Greeting each other.
B．Saying goodbye to each other.
C．Planning to see each other again.
5．Where does the conversation take place?
A．In an office.
B．In a clothing shop.
C．In the man's office.
6．Where will the woman leave for?
7．What is the woman looking for?
8．What do you thint the woman?
A．She is able to manage her things well.
B．She takes good care of her husband.
C．She should have been more careful.
9．What does the man want to do?
A．Buy his wife a sweater.
B．Look for his wife.
C．Go to Australia.
10．What color does the man's wife prefer?
A．Red. B．Orange. C．White.
11．How much does the man pay at last?
A．More than seventyfive dollars.
B．Just seventyfive dollars.
C．Less than seventyfive dollars.
12. What will the man do this summer?
A．Tap a parttime job.
B．Have a trip with his parents.
C．Stay at home with his parents.
13. How long does the woman work every day during the summer?
A．5 hours. B．7 hours. C．10 hours.
14. How did the woman find the job?
A．By working there.
B．By travelling in the mountains.
C．By reading a local newspaper.
15. What is the woman's attitude towards her life in New York?
A．She doesn't like it at all.
B．She thinks highly of it.
C．She feels it just soso.
16. What can we learn about the man from the conversation?
A．He is heavier than before.
B．He loonger than ever.
C．He has been on a diet.
17. Why does the woman loonger?
A．Because she is more energetic.
B．Because she stays in warm weather.
C．Because she lives a healthier life.
18．What did the man do after graduation from high school?
A．He took over his father's business.
B．He worked for his father.
C．He went straight to the college.
19．How did he start his decision for a degree?
A．His friends gave him a suggestion.
B．He surfed the internet one day.
C．God made everything happen.
20．What do you know about the man?
A．He has already got a family.
B．He takes charge of housework every Saturday.
C．He has graduated with his desired degree.
答案：1～5 ABCBB 6～10 CBCAB
11～15 CBBCB 16～20 ACBBA
W：The milk in the refrigerator smells bad. I don't think it