1、学习目标与要求： 1.继续学习现在完成时的用法 2. 学会读和写分数。3.探讨人口过密导致的一系列问题，警戒我们要重视人口问题模块一：自主学习（独立进行）预时 43 钟(Self-study 简称_;是的缩写_一个严峻的问题_ 采取措施做某事_ 有很长的路要走_ 在做某事方面有成效_ 到目前为止_ 迅速提高_作为而出名_= _;因而著名_=_2. 知识点归纳，自主学习，完成下面的内容，记得完成后再讨论。2.1 About one fifth of the people in the world live in China. 世界上大约五分之一的人口生活在中国。【归纳 】五分之一 写法是“_”,
2、 分数做定语，与所修饰的名词之间加了一个_, of 后的 people 是集体名词，所以 live 用的是_ (单数复数)。【链接】英文分数表达法：分子用基数词，分母用序数词，先读分子后读分母。当分子大于 1 时，分母的序数词变复数，直接在词尾加-s。1) 1/7 one seventh 2) 2/5 two fifths 3) 3/4 three fourths 4) 8/9 eight nineths5) 1/ 4 one fourth / a quarter 6) 1 / 2 one second / a ( one ) half从上面有关分数的英语表达方式中可看出，英文分数表达法：分子
3、用_(基数词序数词)，分母用_(基数词序数词)，先读_(分子分母)后读_(分子分母)。当分子大于 1 时，分母的序数词要变_(单数复数) ，直接在词尾加-s。【拓展】 1) Three fifths of the students have passed the exams. 3/5 的学生已经通过了考试。2）One half of the bread has gone bad because of bad weather. 由于糟糕的天气，一半的面包坏了。由上面两句可看出: 分数后面可接可数名词，也可接不可数名词，谓语动词的单复数和_保持一致。【练习】2.1.1 ( ) Do you kno
4、w _ of the students in our class hate math? (2010 中考题)A. two three B. two third C. two thirds D. second three2.1.2 ( ) _ of the area _covered by trees. A. Two-third; is B. Two thirds; is C. Two-third; are D. Two thirds; are 2.2 So far, our government has taken many measures to control the population
5、. 到目前为止，我们政府已经采取了很多措施 来控制人口的增长。【归纳 】“采取措施做某事”意为_“到目前为止”意为_ ，上面整句话的时态是_.【链接】We have learnt over 2000 words so far. 到目前为止，我们已经学了 2000 多个单词了。互评等级：_(1-5)从这可得知，so far 常与_ （填时态）连用。【练习】2.2 到目前为止，我还没有看到她。_. 2.3 It has worked well in controlling Chinas population. 它在控制中国人口方面取得了显著的成效。【归纳】 “_” 意为“在做某事方面很有成效” 【
6、链接】1）You have to work at them. 你得在它们那方面下工夫。2）I have worked out that math problems. 我已经算出那道数学题。3）Dont worry, Im working on it . 别担心，我正在处理这件事。总结：1）“在.方面下工夫”意为_ 2）“算出”意为_3）“处理”意为_【练习】2.3( ) Li Lei _ the math problems all by herself.A. works out B. works C. works in D. works on模块二：交流研讨（小组合作、展示、精讲）预时 20
7、分钟(Cooperation , Exploration , Show 2.训练答题：独立完成(15) ;3、互动(整理提高)(10)4.教师点拨(5基础题 单项选择。( ) 1. The question is _ difficult than that one. So he still cant answer it.A. much too B. much more C. far less D. far too( ) 2. _ of the area _ covered by trees.A. Two-third; is B. Two thirds; is C. Two-third; are
8、 D. Two thirds; are( ) 3. The girl _ confidence. Shes too shy.A. is proud of B. is full of C. is made of D. is short of ( ) 4. Doing eye exercises _ well in _ our eyesight. A. work; protecting B. works; protect C. works; protecting D. work; protect( ) 5. The worlds population has become one of _ in
9、the world today.A. the greatest problem B. the greatest problems C. the greatest questions D. the greatest question发展题：完成句子1. The worlds population is growing _ _ _ (越来越快).2. _ _ (至今), he has learnt about 1,000 English words.3. Their living conditions dont _ _ (似乎) be very good.4. The boss hoped to
10、solve the serious problem _ (成功地)提高题：阅读理解Lamu was a 12-year-old Tibetan girl. She wanted to go to Beijing to watch the 2008 Olympics. Only one month ago, Lamu still thought it would be difficult.In the past Tibet had no railroad (铁路). If Lamu took a bus, it would take her a long time to reach Beijin
11、g. And a plane ticket would cost lots of money.However, things changed for Lamu. She was able to buy a ticket to the worlds highest railroad. The Qinghai-Tibet Railway had been completed! The 1,142-kilometer railroad runs on the Qinghai-Tibet plateau (高原). Lamu could reach Beijing by train in 48 hou
12、rs!About 550 kilometers of the railroad are constructed on the frozen earth (冻土). When the frozen earth warms in summer, it can move the track. But Chinese scientists have built a special structure to solve the problem. The Qinghai-Tibet Railway has been designed with the wild animals in the designe
13、rs minds. It also has special underpasses (地下通道) for animals like Tibetan antelopes (藏羚羊) to go through.“The new railroad greatly helps Tibets tourism,”said Liu Yueqin, an expert at the Chinese Academy of Social Sciences (中国社科院).As more tourists take trains to Tibet, there are more money for Tibetan
14、s. With the money, more kids can go to school.The railroad also makes things less expensive in Tibet. Now one can buy a TV set for about 1,500 yuan. It used to be much higher than that price. When there was no railroad, it had been difficult to send things in and out of Tibet. With the new railroad,
15、 shopping can be more convenient (方便的) and faster.( )1.The special underpasses are _ to go through.A.only for Tibets antelopes B.for Tibets tourismC.for animals D.for Tibetans( )2.Which of the following about the Qinghai-Tibet Railway is TRUE?A.It is not the highest railroad in the world.B.Its the l
16、ongest railroad in the world.C.Scientists have no way to solve the problem of the frozen earth.D.Wild animals have special underpasses to go through.( )3.After the new railroad was completed _.A.everyone could buy a cheaper TV setB.Tibetans can do business in and out of Tibet and develop their tourismC.more and more people could fly to Tibet as soon as possibleD.more and more animals would be killed by people
