1.?Master some new words and useful expressions：

training, bell, whole, learn…from, tidy

Step 1　 Review第一步　 复习 (时间:8分钟)

(检查上节课的探究作业，学生上网查找几个城市的相关信息。交换信息选出优秀作业。)

(教师点评，引出新课。)

T: Many students have done work excellently. Others should learn from them. Now please answer my questions according to the messages you have searched on the Internet or you have known. Please try to use the present perfect.

T: What’s the population of Beijing?

S1: It has already been over 10 million. It’s too big.

T:　 How about the roads?

S2: They have built many ring roads recently. The roads are wide.

T:　 How are their living conditions?

S3: It’s said their living conditions are very comfortable.

They have built many tall buildings in recent years.

T:　 Oh, good job. Who can talk about other cities?

S4: Tokyo is a city with a large population. Its economy has increased rapidly. Their living conditions are comfortable enough. The roads are good.

S5: Toronto is the biggest city of Canada. The people there live a happy life. Many people live in big houses…

S6: New York…

S7: The city I live in is...

(教师点评。)

T: Well done. There are many places to visit on the earth. I hope that I can travel all over the world. Oh, I remember a thing. Unless something unexpected happens, my best friend will go to America next month to do further study. She is lucky.

　(板书 unless,注音、领读、释义。)

I hear it takes a couple of hours to go there by plane from Beijing.

(板书couple,注音、领读、释义。)

T: Have you been abroad?

幻灯片或小黑板/ 城市信息的图片

3. Review some useful sentences:

(1)I really hate to go shopping.

(2)So do I.

(3)Great changes have taken place…

(4)...about one fifth...

(5)What's the population of China?

2. Review present perfect：

(1) have/has been to…

(2) have/has gone to…

(3) the usage of “just, yet, already, ever, never”

1. Master some new words and useful expressions:

unless, couple,　 even though, market, excellent, a couple of, difference, grandson

2.Homework:

Make a survey and complete the chart, then write a survey report. You can search the information on the Internet.

Section D

The main activities are 1a and 4. 本课重点活动是1a和4。

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:

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.

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.

(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. must find　　 2.is growing　 3.has become　 4are　　 5.has reached　 6.has tried