高三总复习必修四UnitTwo
Unit Two Working the land
一、重点导学
根据所给句子判断知识点的词性词义，并归纳其用法
1、arch 词性： 词义：
※ 原句再现
Dr. Yuan arched for a way to increa rice harvests without expanding the area of the fields.
袁博士寻找一种在不扩大土地面积的情况下增加收成的办法。
※ 拓展学习
The guards arched the hou carefully.
They arched the woods for the lost boy.
What are you arching for?
I often arch my heart if I am a competent teacher.
We started at once in arch of something to eat.
※ 重点操练
The scientists are ______ a new element.（寻找）
2、expand 词性： 词义：
※ 原句再现
Dr. Yuan arched for a way to increa rice harvests without expanding the area of the fields.
袁博士寻找一种在不扩大土地面积的情况下增加收成的办法。
※ 拓展学习
A tyre expands when you pump air into it.
Xi’an is expanding in all directions.
Heat expands metal.
He has expanded his business.
Let me expand on my idea.
cba全场回放
※ 重点操练
The company is eager to ______into new markets.(开辟)
3、circulate 词性： 词义：
※ 原句再现
菠萝蜜籽怎么吃
Dr. Yuan is now circulating his knowledge in India, Vietnam and many other less developed countries to increa their harvest.
截然不同的反义词袁博士正在把他的知识用在像印度、越南这些不发达的国家以便于增加它们水稻的产量。
※ 拓展学习
Blood circulates in the body.
It does good to a country’s economy if money circulates.
Bad news circulates quickly.
Some people like to circulate fal news.
※ 重点操练
It's a simple matter to ______ a newspaper in the metropolitan area.（发行）
4、rid 词性： 词义：
※ 原句再现
Thanks to his rearch, the UN has more tools in the battle to rid the world of hunger.
多亏了他的研究，联合国在消除世界饥饿的战斗中又多了些方法。
※ 拓展学习
Let's get rid of this moldy old furniture.
We will be glad to get rid of him.
She was glad to be rid of him.
红豆饼的做法家常Will I ever be rid of this cold?
It took me a month to get rid of my cough.
You should get rid of smoking.
褒义词语※ 重点操练
What way are you thinking of ______ the flies?（清除）
5、build up 词性： 词义：
※ 原句再现
The chemicals in the food supply build up in people’s bodies over time.
经过很长时间，食物中所提供的化学物质会在人的体内聚集。
※ 拓展学习
He has built up a good business over the years.
We have achieved great success in the cau of building up our country.
You must build up your strength again.
哭有什么用Good food builds up the body.
前的英语
We first have to build up some experience.
China has built up enough money to cope with the economic crisis.
The clouds are building up.
The noi built up till Mary couldn’t stand it any longer.
※ 重点操练
Students should play more on the playground to ______ their bodies.（增强）
6、focus on 词性： 词义：
※ 原句再现
They focus on keeping their soil rich and free of dia. 他们把注意力集中在保持土壤肥沃且免受病害。
※ 拓展学习
Focus the light on the object while I am taking a photo of it.
The scientist focud the telescope on the moon.
You should focus your attention on your study.
All eyes were focusing on her.
※ 重点操练
They must ________ the quality of the products.(注重)
7、free 词性： 词义：
※ 原句再现
They focus on keeping their soil rich and free of dia. 手机串号是什么
他们把注意力集中在保持土壤肥沃且免受病害。
※ 拓展学习
The old couple are now free of burden.
If your salary is under 3500 Yuan one month, you are free of income tax.
When I am tired, I can be free of noisy city.
We will be free of school in three months.
The houwife opened the window to free the room of smoke.
Keep the vegetables free from poison.
Society should keep children free from bad effects.
Teachers should free students from heavy studies.
You should free me from houwork.
This ntence is free from mistake.
I am free from dia.
※ 重点操练
—What about the protection ?
—Let’s keep the surface ______ dirty by putting a cover over it .（不被）
8、be lost in 词性： 词义：
※ 原句再现
He was lost in thought. 他陷入深思。
※ 拓展学习
The thief ran away and was lost in the crowd.
The snowflakes were soon lost in the water.
The student was lost in thought.
The boy was lost in the book.
They must be lost in the forest.
It is very easy for a stranger to get lost in Shanghai.
※ 重点操练
_____ in thought , he almost ran into the car in front of him .（陷于）
9、advi 词性： 词义：
※ 原句再现
He studied ways of keeping eds and advid farmers to choo ed-heads which had the best color.
他研究保存种子的办法并且建议农民们挑选颜色最好的穗株。
※ 拓展学习
They advid an early start tomorrow.
We have to stay here, can I advi it?
Can you advi me where to stay when I am in Xi’an?
