高中英语 人教版 必修4 Unit 2 Working the land Part7 Using Language 课件（14张）

课件14张PPT。 Using Language一、提问答问 1. 化肥怎样损害土壤的？1. How do chemical fertilizers damage the land?
By killing helpful bacteria and pests.2. 化肥是如何损害庄稼的？
How do chemical fertilizers damage the crops?
They stay in the ground and underground water for a long time.
3. 为什么化肥损害人体健康？
Why do chemical fertilizers do harm to people’s health?
Because they build up in people’s bodies through food.4. 现在农民喜欢用什么肥料种地？
What kind of fertilizer do farmers like to use now?
Organic farming.
5. 有机肥有什么优势？
What advantages does organic farming have?
Organic farming keeps soil rich and free from disease.二、内容概括 The passage tells us that chemical fertilizers can cause many problems, hurting the land and water and doing harm to people’s health, so organic farming which keeps soil rich and free from disease is becoming more popular with farmers nowadays.Crops such as peas or soybeans put important minerals back into the soil，making it ready for crops such as wheat or corn that need rich and fertile soil. 像豌豆或大豆这样的农作物将重要的矿物质带回土壤，从而使之适宜于种植要求土壤肥沃的农作物，比如玉米或小麦。(P14)
［分析］making …是现在分词短语作_______ ; that need rich and fertile soil是______从句修饰crops.定语结果状语［仿写］他的父母在地震中丧生了，留下他成了孤儿。(分词作状语)His parents died in the earthquake, leaving him an orphan.Yuan Longping is famous for __________
(supply) the farmers with super hybrid rice
seeds.
2. Some organic farmers prefer _________
(plant) grass between crops to _________
(prevent) wind or water from carrying away
the soil.supplyingplantingprevent一、单词拼写 3. Mr Brook cares little about spending
the money on himself or ________ (lead) a comfortable life.
4. Chemical fertilizers kill both _________
(help) and harmful bacteria and pests.
5. I am a bit_________ (confuse). Is that her husband or her son she is with?confusedleadinghelpful二、选词填空

What are some of the problems 1______
by chemical fertilizers? First, they 2______
the land by killing the helpful bacteria and pests 3___________the harmful ones. damage ; cause ; stay ; affect; be full of ; wash off; as well as ; lead to; build up; in additioncauseddamageas well asChemicals also 4_______in the ground and underground water for a long time. This 5_______crops and, therefore, animals and humans, since chemicals get inside the crops and cannot just be 6___________. These chemicals in the food supply 7_________in people’s bodies over time. Many of these chemicals can 8_______cancer or other illnesses. stayaffectswashed offbuild uplead to9 __________, fruit， vegetables and other food grown with chemical fertilizers usually grow too fast to 10 _________much nutrition. They may look beautiful, but inside there is usually more water than vitamins and minerals.be full of In addition三、完成句子
1.石油的发现将会使这个国家富裕起来。
__________________ will make the nation get rich.
2.我们的政策是集中精力把这些地区发展起来。
Our policy is ___________ developing these areas. The discovery of oilto focus on3.他的病是因缺乏营养造成的。
His illness resulted from ______________.
4.条条大路通罗马。
_____________________. All roads lead to Romelack of nutrition