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1、,英语教学课件系列,必修4,Unit 2 Working the landWorkbook,Listening on page 48,Do you remember the poem? 天苍苍, 野茫茫, 风吹草低见牛羊。,Can we see this beautiful scene again?,Can we see this beautiful scene again?,1 What makes the worlds desert grow? First tick the causes you think are true. Then listen to the tape and tic
2、k what you hear.,1. Heat and little rain. 2. Turing forests into farmland. 3. Overusing fields to feed farm animals.,You think,You hear,4. Using new scientific farming methods. 5. Wasting water in farms and at home. 6. Farming too much on poor land.,You think,You hear,2 Listen to the tape again and
3、choose the best answer to each question on page 48.,Answer: B A B,Listening text,Why do we have deserts today? Deserts have not always been here. Most deserts that we have today were once green lands full of the plant life. One of todays biggest deserts is in North Africa. However, in the 1st centur
4、y BC farms in the North Africa grew corn and wheat to make bread for the whole city of Rome. How did this area become desert?,FIGHTING GROWING DESERTS,Both weather and people can help form a desert. Hot weather or very little rain makes the land so dry that nothing can grow. If people cut down or bu
5、rn trees and plants to make land clear for farming, the wind can blow the soil away and turn the dry land into sand. Another big problem is farming on land that is not very good.,This poor land can very quickly turn into desert, if it is farmed too much. One of the biggest causes, however, is when p
6、eople take their animals to the same fields to feed over and over, and the fields finally lose all their nutrition. Because of these problems, deserts are slowly taking over green land in many parts of the world, including China.,However, we can fight the growing deserts! In some parts of China peop
7、le are working to prevent desert from expanding. In Xinjiang, for example, some farmers are trying new scientific farming methods. These methods make it possible to use less land for crops, so farmers then can plant trees on the rest of their land!,One Xinjiang farmer used only half of his fields to
8、 grow the same amount of crops as last year. On the other half of his land, he planted fruit trees. The work of people like this is helping to fight the worlds growing deserts.,Who is he?,贾思勰北魏末年和 东魏时的著名农学家, 为我国完整保存至今 最早的农书齐民要 术的作者。贾思勰 具有广泛的农事知识, 他深入乡里访问农家, 并到田间亲自观察实验, 结合古文献中的资料与自己的心得, 较为系统地,总结了6世纪以
9、前中原地区的农业生产经验。齐民要术全书10卷，92篇，分别论述了各种农作物、蔬菜、果树、竹木的栽培，以及家禽家畜的饲养，农副产品加工等。尤为可贵的是，书中还记写了干旱地区的耕作、果树的嫁接等, 反映了北朝时期农业生产的发展情况。,born-in Yidu in Shandong Province,live-in the sixth century AD,What did he do - research, collect information, study, do experiments and write a book called Qi Min Yao Shu.,1. What made
10、 Jia Sixie become interested in improving Chinese farming?He saw how some farms produced good crops and healthy animals and others did not.,2. How did he think he could help farmers?He thought that when he found the best agricultural methods he would write them down for all farmers.,1 Answer the que
11、stions.,hang seed-heads up to dry all winter, knock seeds out when they are sown,choose ones with the best colour,2 Make notes in the chart.,let animals eat them before planting,turn the soil over so the weeds die.,deep ploughing,less deep ploughing,change crops grown in the same field every year.,1
12、. He was lost in thought.be lost in sth. 全神贯注; 沉浸于_ in thought, he almost ran into the car in front of him. NMET96 A. Losing B. Having lost C. Lost D. To lose,Language points,C,【简析】be lost in thought为固定搭配, 意为“陷入沉思”, 因此答案选C。过去分词短语lost in thought与句子主语he构成逻辑上的动宾关系, 且在句中作原因状语。,有关lose的短语:be lost in thoug
13、ht/admiration 陷入沉思/敬佩不已 lose ones cool 失去耐心 lose heart 丧失信心lose ones heart to 爱上 be at a loss for sth. 对不知所措,2. The next spring the seeds should be knocked out of their seed-heads and sown. knock out of 把敲出来 有关knock的短语: knock into sb. 表示“撞在某人身上” She was in such a hurry and knocked into her teacher.
14、她太着急了, 并且撞在了老师身上。,knock into 还可以表示“把敲进” Knock a long, strong stick into the earth. 把一根又长又粗的木棍敲进土壤里。 knock out 打败 knock off (口语) 停止 (工作) knock up (口语) 敲门叫 (人) 起床 knock down (车等) 撞倒 (人) knock in 敲进 (钉子) 等,Farmers proverbs & sayings,Yellow sky at sunset, wind in the morrow. 日晕而风 2. Rain before seven, c
15、lear by eleven.雨过天晴。 3. April showers bring May flowers.四月里的豪雨, 会带来五月里的繁花似锦。 4. Deeds are fruits, words are but leaves. 行动是果实,言语只是叶子。 5. Never cackle till your egg is laid. 事竟成, 才声张。,Speaking Task,Jia Sixies work was written 1,600 years ago. Is it still at all useful today? In pairs, discuss the following questions and take notes on your conclusions. 1 What ideas in Qi Min Yao Shu are stillin farming today? 2 What problems do we have today in modern farming that Jia Sixie did not have in his time?,
