资源简介

(共28张PPT)
Unit 1
The changing world
第2课时 (Section A 2a-2d)
R·九年级上册
It took half a day to reach the town.
With the new road, it takes only nearly 40 minutes.
Going to school by bus took nearly an hour.
Going to school takes only 15 minutes.
Review and say
Li Rui’s hometown has change greatly.
Traffic (交通)
used to travel far to see a doctor.
has built a new hospital
didn’t have good places for shopping
now have a supermarket down the street
Public facilities (公共设施)
They are now covered with beautiful trees.
Environment (环境)
The hills were covered with sand.
What problems did Li Rui’s hometown once face when dealing with the environmental problems
sandstorms
沙尘暴
What problem does the picture show
/ s ndst m/
A sandstorm (沙尘暴) is a strong, dry windstorm that carries large amounts of sand, dust, and fine soil particles into the air.
water shortage
水资源短缺
/ t d /
There is not enough clean, usable water to meet the needs of people, farms, factories, or the environment in a certain area.
farmland shortage
/ fɑ mlnd/
耕地短缺
Not enough land for farming.
Not enough fields to plant rice, wheat, vegetables, etc.
Maybe caused by urban expansion, desertification, land being built into houses or factories
lack of technology
/l k/
缺乏技术
Not having enough modern tools, machines, skills or knowledge to do something effectively.
sandstorms
water shortage
farmland shortage
lack of technology
Rank the following problems from 1 to 4, with 1 being the worst. Give your reasons.
2a
lack of technology
sandstorms
water shortage
farmland shortage
1
3
2
4
Give your reasons.
Water is the most basic need for all living things, including people, animals, and crops. Without enough clean water, people cannot drink or cook, crops will die, and daily life will stop. This problem directly threatens human survival, so it is the most serious.
Water shortage (Rank 1)
Give your reasons.
Farmland is where we grow food. If there is not enough farmland, we cannot produce enough food for everyone. Food shortages can lead to hunger and social problems.
Farmland shortage (Rank 2)
Sandstorms can damage houses, pollute the air, and make it hard to breathe. They can also destroy crops and make farmland worse. However, they are usually seasonal or regional problems, and their impact is not as constant or common as water or farmland shortages.
Sandstorms (Rank 3)
Give your reasons.
A lack of technology makes solving the other three problems harder, it is not a direct threat to survival pared to the other three problems, its effects are more indirect and can be improved over time.
Lack of technology (Rank 4)
Give your reasons.
Listen to the conversation between George’s father and Li Rui’s grandfather. What problems in 2a did they mention
2b
They mentioned two problems—sandstorms and farmland shortage.
Past
Action
Present
How has the environment affected local lives
2b
There used to be __________ all the time, and the ______ were getting smaller and smaller.
Locals worked by ___________.
Locals found a bush. It had ________ roots that could _________the soil together.
They began planting it in sandy ________, with the government’s support.
They had __________ to help.
The corn fields are _________.
They have planted many bushes and _________ since then.
They are __________sandstorms now and the environment is getting _________.
It has improved local lives.
过去
措施
现在
Past
Action
Present
View and predict
There used to be __________ all the time, and the ______ were getting smaller and smaller.
Locals worked by ___________.
Locals found a bush. It had ________ roots that could _________the soil together.
They began planting it in sandy ________, with the government’s support.
They had __________ to help.
The corn fields are _________.
They have planted many bushes and _________ since then.
They are __________sandstorms now and the environment is getting _________.
It has improved local lives.
What speech of word is probably missing in the blanks
n.
n.
n.
adj.
v.
n.
n.
adj.
n.
adj.
adj.
There used to be+某人/某物
(+其他). 过去有......
土壤
政府
玉米；谷物
Past
Action
Present
Listen again and fill in the table.
There used to be __________ all the time, and the ______ were getting smaller and smaller.
Locals worked by ___________.
Locals found a bush. It had ________ roots that could _________the soil together.
They began planting it in sandy ________, with the government’s support.
They had __________ to help.
The corn fields are _________.
They have planted many bushes and _________ since then.
They are __________sandstorms now and the environment is getting _________.
It has improved local lives.
sandstorms
fields
hand
long
hold
areas
machines
huge
trees
fewer
better
Read and check the answers.
I’m amazed by how green your hometown has become!
Have you seen the corn fields outside of the town yet
Yeah! They’re huge!
There used to be sandstorms all the time, and the fields were getting smaller and smaller. Then, after one big sandstorm, we decided to do something.
What did you do
We found a small bush. It had long roots that could hold the soil together. We began planting it in sandy areas. The government provided support too.
Bob:
Grandpa:
Bob:
Grandpa:
Bob:
Grandpa:
Past
Present
Action
Wasn’t it difficult to plant so many bushes
Yes, it was. At the beginning, we worked by hand. Later, we had machines to help. We have planted many bushes and trees since then. There are fewer sandstorms now and the environment is getting better. It has also improved our lives. Everyone has become richer and happier.
Bob:
Grandpa:
Past
Present
Discuss how the problems in 2b were solved.
2b
A: The area used to be covered with sand.
B: What did they do to solve this problem
A: They planted bushes and trees. The land has become ...
A: The area used to be covered with sand.
B: What did they do to solve this problem
A: They planted bushes and trees. The land has
become useful. Local people can grow vegetables
and fruits here now, and their life is getting better
and better.
活动示例:
Language points
1. water shortage （教材 P3）
shortage / t d / [名词]短缺
搭配：a shortage of 缺少…… 其后常接 water, money, material 等表具体物质或资源类的名词。
句型：There is no shortage of... 不缺…… /……有的是
The city is suffering from a shortage of fresh water.
这座城市正遭遇淡水短缺。
There is no shortage of (=There are plenty of) things to do in the city. 城市里不愁没活干。
2. lack of technology（教材 P3）
lack /l k/
(1) [名词]缺乏
搭配: lack of 缺乏…… 其后常接 sleep, interest (兴趣), patience，courage 等表抽象概念的名词。
The research shows that lack of sleep can affect our memory.
研究表明，睡眠不足会影响我们的记忆力。
(2)[动词]缺乏；不足
She used to lack confidence, so she seldom answered questions in class. 她过去缺乏自信，所以她很少在课堂上回答问题。
3. It had long roots that could hold the soil together.
（教材 P3）
root /ru t/ [名词]
(1)根
Plants take in water through their roots.
植物通过根来吸收水分。
(2) 根源；起因
搭配：the root of ……的根源/起因
Lack of education is the root of these social problems.
教育缺失是一些社会问题的根源。
4. We began planting it in sandy areas. （教材 P3）
sandy / s ndi/[形容词]铺满沙子的；含沙的
由“sand(n.沙子)+-y”构成
搭配：sandy soil 沙质土壤 sandy beach 沙滩
My aunt grew some peanut in sandy soil.
我姑姑在沙地里种了一些花生。
5. The government provided support too. （教材 P3）
support /s p t/
(1)[不可数名词]支持
搭配：with one’s support 在某人的支持下
With your support and help, we succeeded in finishing the project on time.
在你们的支持和帮助下，我们成功地按时完成了项目。
(2)[动词]支持 搭配
support sb in (doing) sth 在(做)某事方面支持某人
Whatever you do, we will support. 无论你做什么，我们都支持你。
His family supported him in making his own decision.
他的家人支持他自己做决定。
(3)[动词]赡养；抚养
She has to work hard every day because she has two children to support. 她必须每天好好工作，因为她有两个孩子要抚养。
Homework
Review the language points of this lesson.
Talk about how Li Rui’s hometown solved the problems—sandstorms and farmland shortage.
Do some related exercises.

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