课程内容
高中英语《克隆 Unit 2　Cloning（Part 3）》（选修8）
Review
从句练习题
1.One of them held the view (B)the book said was ritht.
A what that     B that what    C that   D whether
2.The reason (C)he has to go is( )his mother is ill in bed.
A why;why   B why;because   C why;that   D that;because
3.They received orders (B)the work be done right away.
A which     B that     C /     D when
4.I have no idea(C).
A how to do
B when shall we start out for the trip
C what has happened to my wife
D how much have they earned
5.Information has been put forward (B)more middle school graduates will be admitted into universities.
A while   B that  C when  D as
6.Along with the letter was his promise (B)he would visit me this coming Christmas.
A which  B that  C what  D whether
7.There is a new problem involved in the popularity of private cars(A) road conditions need( ).
A that;to be improved
B which;to be improved
C where;improving
D when;improving
8.That's the only thing (C) he can do now.
A which     B all      C that      D what
Grammar
The Noun clause( 三）
名词性从句总结
名词性从句包括：主语从句，宾语从句，表语从句，同位语从句
名词性从句的特点
(1)语序
（2）时态
（3）连接词的选用
（4）和其它从句的区别
一、名词性从句的语序；陈述语序
(1)that和whether/if 引导的从句用陈述语序
She wondered if/whether the buses would still be running
She sensed that she was being watched by a tall man in a dark coat.
(2)疑问词引导的名词性从句也要求使用陈述句语序，不能用一般疑问句（倒装）语序
Could you tell me where he lives?
How he succeeded is still a puzzle.
二 名词性从句的时态；主从一致
名词性从句的时态主要考查宾语从句中时态
1.如果主句时态是现在时或将来时，从句谓语可根据句意需要而选用任一种时态。
他相信他的梦想总有一天会实现的。
He believes (his dream wil come true some day).
请告诉我你昨天这个时候在干什么
Please tell me (what you were doing at this time yeaterday).
2.如果主句谓语是过去时，从句谓语动词一般用过去的某种时态，但从句表达的是真理、自然规律等时，从句谓语通常用一般现在时。
他告诉我他正在为考试做准备。
He told me (he was preparing for the examination).
他说他已离开家乡十年了。
He told me (he had been away from his hometown for ten year).
老师告诉我们光是沿直线运行的。
The teacher told us (light travels in a straight line).
3.在“命令，要求，建议”等相关词后的名词性句中常用虚拟语气（suggest(建议），propose,order,insist(坚决要求）,command,require,request,recommend(建议）advise....,包括宾语从句的时态，其相应名词的同位语从句，表语从句的时态也应用虚拟语气，即should+do/be,should可省去不要.)
He suggested that we (should) go there at once.
His suggestion is that we (should)go there at once.
His suggestion that we(should)go there at once is right.
三、名词性从句中的连接词的选用
连词：because that/whether/as if(though)
连接代词：what/who/which/whose/whom/whatever/whoever/whomever/whichever
连接副词：where/when/why/how/wherever/whenever
连词：引导从句，但在从句中不作成分
that:无词义，不作成分，起连接作用
whether/if:“是否”不作成分，起连接作用
as if(though):“好像”，只连接表语从句
because:“因为”，只连接表语从句
连接代词：引导从句，并在从句中作成分
what(ever):（无论）什么，作主/宾/表/定语
which(ever):(无论）哪一个（些）作主，宾，表 ，定语
who(ever):“（无论）谁（主格）”作主，宾
whom(ever)：“（无论）谁（宾格）”
whose(ever)：“无论）谁的，作定
连接副词：引导从句，作状语
when (ever)：”什么时候“作状语
where ："什么地方"
how:怎样
why:为什么
Skimming
Read the text,and then tell the following sentences are true or false.
1.Scientists are still experimenting with cloning mamals because thet think it can make meney.
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.
Comprehending
Read The return of the dinosaurs carefully and then answer the following questions.
1.Why shouldn't you clone an extinct animals unless there is enough diversity in the group?
There will not be enough genetic variation in the group to be able to resist new illnesses.
2.Why is it wrong to clone an extinct animal if it would have to live in z zoo?
It is not a good idea to clone an animal that would have to live in a zoo because it is not a suitable habitat to develop and increase its numbers.The zoo is not a natural environment for a wild animal.
3.Why can't you clone the DNA of animals that have been extinct longer than 10,000 years?
The DNA of animals more than 10,000 years old is not suitable for cloning,for it can't survive so long.
难句解析
1.From time to time,people suggest that extinct animals like dinosaurs,can possibly be brought back to life through cloning.
人们时常设想那些绝种的动物，例如恐龙，有可能通过克隆技术使它们复活。
2.Diversity in a group means having animals withe their genes arranged in different ways. 
群的多样性指的是拥有基因排列方式不同的动物。
Homework
1.Go through the Noun Clauses and point out the difficulities.
2.Get ready for Unit 3.