资源简介

(共28张PPT)
Unit 1 The Changing World
Topic 2 The population in developing countries is growing faster.
Section C
Language goals
By the end of the class, you will be able to
1.Master the following words ,phrases and sentences:
Words： social, supply, natural, worse, government,
paragraph, opportunity, newborn, percent, offer
Phrases: half of, one fifth, because of, satisfy people’s daily
needs, so far, take measures to do, be known as,
work well in, thanks to
Sentences： We still have a long way to go.
2. Read the fractions in English.
3. Talk about population problems.
8
88
888
8,888
88,888
888,888
8,888,888
88,888,888
888,888,888
8,888,888,888
88,888,888,888
888,888,888,888
Tongue twister
Lead in
What do you get from the video
The growing population may cause serious problems, such as food, living space, pollution and so on.
So far, China has the largest population.
That's one fifth of the world population.
到目前为止
五分之一
The population in developing countries is ________ than that in developed countries.
Which country has the largest population
What’s the population of China
larger
1a 1. Before you read the passage, discuss the
questions with your partner.
1) Why does China carry out the one-child policy
2) What social problems do you think China’s large
population has caused
1a Read and understand.
2. Write the title of the passage.
1b Read 1a and match the main idea with each paragraph.
1. _____ Paragraph 1 A. the measures to deal with the
problems
2. _____ Paragraph 2 B. the world’s and Asia’s population
3. _____ Paragraph 3 C. the problems caused by large
population
Population Problems
B
C
A
1c Read 1a again and complete the table.
Population of China ____________________
Social problem less ______________
fewer _______ opportunities
less _______ and ______
crowded ________
heavy _________
________ natural environments
Government measure _____________________
1.3 billion
job
energy
water
cities
traffic
worse
the one-child policy
living space
Asia has a population of _________________. That’s to say, almost ______ of the people in the world live in Asia now.
more than 3 billion
half
Paragraph 1
The world’s and Asia’s population.
Read Paragraph 1 and fill in the blanks.
3 billion÷ 6.8 billion≈1／2
(half)
50 percent (50%)
Almost half of the people in the world live in Asia.
1.3 billion÷6.8 billion≈1 ／ 5
20 percent (20%)
About one fifth of the people in the world live in China.
one
What social problems has it caused
Paragraph 2
The problems caused by large population.
fifth
Because of the large population,
there is __________________ for each family.
less living space
Read Paragraph 2 and fill in the blanks.
Because of the large population,
it is difficult for lots of people ______________.
to find jobs
Because of the large population,
it is hard for China to supply _______ and ______ to satisfy people’s daily needs.
energy water
Because of the large population,
most cities are ______________ than before, and the traffic is much __________.
more crowded
heavier
Because of the large population,
natural environments are becoming _______
_____________.
worse
and worse
The one-child policy
— Every couple can have only one child.
So far, the one-child policy has worked well in
controlling China’s population.
We still have a long way to go.
Paragraph 3
The measures to deal with the problems.
Every minute, about 261 babies are born in the world. That means people have to _____ food for about 375 840 newborn babies every day. The world’s population _______________ faster and faster. It has _______ one of the biggest social problems today.
China ______ the largest population in the world. There are about 1.3 billion people in China. It has ________ 20 percent of the world’s population. China has ____________ some policies to control the population, and these policies have _______ well. But China still _______ a serious population problem.
2 Complete the following passage with the correct forms
of the given words or phrases.
find
grows/ is growing
become
carried out
reached
grow reach have find work become face carry out
has
worked
faces
3a Work in groups and search for the information about the following questions. Then share your idea with your group members.
1. How do you think we can get more living space
2. What should the government do to offer more job opportunities
3. The energy and water is less and less. What should we do to deal with it
4. The traffic in cities is much heavier than before.
How can we solve the problem
3b Write a short passage of three paragraphs based on 3a.
China has the largest population in the world. It has caused many problems. Everyone should do something to solve them.
First, the government should keep the one-child policy to control the increasing population, and practice the reform and opening-up to develop our economy. Only in this way can we get more jobs and improve our living conditions.
Second, the energy and water is becoming less and less. We’d better save them as much as possible, and try to find more new energy. In order to solve the problem of heavy traffic, we call on everyone to take a bus or walk as often as possible.
Choose the best answer.
1. _____ of the students are boys in our school.
A. Two third B. Two threes C. Two thirds D. Second three
2. The one-child policy has _____ controlling China’s population.
A. been good at B. done well in
C. taken care of D. worked well in
3. Edison is known _____ a great inventor.
A. for B. as C. in D. on
4 ._____ your help, I made great progress in math.
A. Thanks for B. Thanks to
C. Thank to D. Thank for
C
D
B
B
Exercises
one sixth
one ninth
one twentieth
five sixths
two ninths
seven twentieths
ATTENTION
Summary
one / a half
a quarter
three quarters
three and a half
分数(或百分数)作主语时，谓语动词的形式由分数（或百分数）后面的名词来决定。如果时单数名词或不可数名词时，动词用单数形式；如果时复数名词，动词用复数形式。
如：Two fifths of the apple is red.
One third of the students in my class are boys.
past
now
so far
So far, I have read five English novels .
2. supply sth. to sb. / supply sb. with sth.
provide sth. for sb. / provide sb. with sth. 给某人提供某物
offer sth. to sb. / offer sb. sth.
3. be known as: 作为……而出名
be known for: 因……而出名
4. work well in doing sth. 在做某事方面很有成效
Reading every day has worked well in learning English.
5. thanks to: 多亏了……（含义相当于because of…或 with the help of …）
thanks for doing sth. 多谢……
Homework
1. Write the composition in 3b.
2. Preview Unit 1 Topic 2-Section D.
Bye-bye!

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