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(多媒体或图片展示几组这样的场景:
（1）拥挤的交通（2）喧闹的商店、饭店等公共场所
（3）一批批涌动的南下的劳动大军（4）招聘会上寻职的大学生 （5）几代人居住在一起的狭小的单元房（6）水能电能短缺的报道
T: After watching them, please discuss it with your partner, and then describe them. You can do them according to 1b on page 13. (教师走入同学中，与他们一起探讨并加以引导。) T: Stop here please. Who can talk about them?
S1: Because of the large population, we are short of energy and water. The
traffic is too heavy. I think it’s dangerous to cross the street. There are many people here and there. So doing an easy thing gets difficult. For example, buying a ticket, taking a bus...we must wait. It’s too boring.
(另一个学生站起来补充。)
S2: Because of the large population, it’s difficult for many people to find a job, every year some people will lose their jobs. In many big cities, there are few places to live in. It’s said there’s standing room only on the earth.
Step 4 Practice 第四步 练习（时间:11分钟）
（老师总结，并拿出一张“地球上站满人”的图片展示给大家，为下一步学习做铺垫。）
T: You’re right and you did very well. Look at the picture; the earth has been full of people.
The population is still serious. Please listen to the tape and complete the article on page 14.
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(教师播放录音，学生做2a。)
(教师提问同学完成的情况，若大部分同学不能完成，再听一遍录音。) （教师核对答案。）
T: Let's check your answers.
1. must find 2.is growing 3.has become 4are 5.has reached 6.has tried 7. have worked
(让学生根据2a, 完成2b。)
T: OK. Please finish the task of 2b according to 2a. (老师核对答案，并让学生加以解释说明。)
T: S1， please give us the answer to the first one. S1: T.
T: You’re right. S2, the second one.
S2: F. China has a larger population than India. T: Yes. S3, the third one.
S3: F. China has about 20 percent of the world’s population. T: Very good. S4, the fourth one. S4: T.
(老师点评，为了进一步巩固本单元所学的有关人口的问题让大家轻松一下，因此做一个数字游戏。)
T: Yeah. Your answers are right and you explain them well. From the topic,
we have already known a lot of information about population. Let’s play a number game. Please say sth. about population. You must use a number to express your opinions.
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(让学生说出了解到的有关人口信息，每条信息必须使用一个数字来表达自己的观点。)
T: Are you ready? OK, let’s begin.
S5: In 2005, the population of the world is about 6.5 billion. S6: In 2005, the population of China is about 1.3 billion. S7: One fifth of the people in the world live in China. S8: In 1985, the population of China was 1.06 billion. S9: More than 3 billion people live in Asia.
S10: In every one minute about 261 babies will be born.
S11: People have to produce food for over 376 303 mouths in a day. S12: The lifespan has risen from 24 in 1930 to 35 in 1949. S13: The lifespan has risen from 68 in 1981 to 71 in 1999.
Step 5 Project 第五步 综合探究活动 （时间:6分钟）
1.（游戏结束，教师点评，引出教材3。）
T: To my surprise, you have known about the population so much. Quite good. Now, turn to Page 14 and discuss the questions of 3. (学生们互相交流想法。)
T: OK. Let’s write an article about the population problem in China to your pen friend in another country. The questions that you discussed just now may help you. Pay attention to the form of the letter and try to use the present perfect tense in your article. You can write now. (学生准备过程中，教师深入指导。)
（程度好的同学快速完成，教师让其读范文。程度差的同学注意听，课后继续完成。） T: Who can read your article to us? For example:
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Dear...,
How time flies! I have been back to school for two weeks. These days, I have known a lot about the population in China.
China has a population of 1.3 billion. It has reached about one fifth of the world’s population. About 80 percent of the people live in the countryside. It causes many difficulties. In less developed areas, some parents prefer boys to girls. Not all the families can offer their children a good education. Some children can’t go to school.
China has taken measures to control the population. China’s economy grows much faster and their living conditions have changed a lot. Most of us have lived in bright and tall buildings. We have had ring roads and they are wide enough. We have had more comfortable life. However, the large population problem is still serious in China.
How about the population of your country? Can you tell me about it? Yours, Kangkang
T: You have done well. Next, who is ready to read yours? (教师请一、二位同学读短文。点评、布置作业。)
T: Excellent. You make me happy. Here’s your homework for today. 2.Homework:
Make a survey and complete the chart, then write a survey report. You can search the information on the Internet.
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City Beijing Tokyo Toronto New York Population Roads Living conditions Your city
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