高一英語人教版必修4Unit2workingthelandusiinglanguage

1、 what do farmers usually put on the soil to make crops grow fast ? it is fertilizer. how many kinds of fertilizers do farmers use? there are two kinds. they are chemical fertilizers and natural fertilizers . which kind do farmers use when they are doing organic farming? do you know about organic far

2、ming? organic farming organic farming is simply farming without using any chemicals.i. read the passage underline the topic sentence of each paragraph.how many ways farmers use to help crops grow are mentioned in the passage long-term use of chemical fertilizerscan cause damage to the land and peopl

3、es health. farmers and customers turn to organic farming.other methods to keep the soil fertile. problems caused by chemical fertilizers.p1.p2.p3.p4.use natural waste from animals as fertilizers change the kind of crop in each field every few years plant different crops with different lengths of roo

4、ts plant grass between crops and then leave it in the ground organic farming what is organic farming ?methods of organic farmingadvantages of methodsfarmers use natural waste from animals.this makes the soil richer in minerals and so more fertile.this also keeps the air ,soil ,water and crops free f

5、rom chemials.methods of organic farmingadvantages of methods2 farmers often change the kind of crop in each field every few years.put important minerals back into the soil, making it ready for other crops that need rich and fertile soil methods of organic farmingadvantages of methods3 farmers plant

6、crops with different lengths of roots.4 farmers sometimes plant grass between crops and leave it in the ground.3 this uses different levels of soil.4 this prevents wind or water from carrying away soil and acts as a natural fertilizer for the next years crop.增強(qiáng)增強(qiáng); ; 導(dǎo)致導(dǎo)致轉(zhuǎn)向，求助于轉(zhuǎn)向，求助于關(guān)注，集中注意力于關(guān)注，集中注意力

7、于使使免于，擺脫免于，擺脫每隔幾年每隔幾年阻止阻止language points1. lead to用法用法寓詞于境寓詞于境 閱讀下列句子，注意閱讀下列句子，注意lead to的意的意思和用法。思和用法。1. his carelessness led to the accident.2. this test is obviously bad because it leads to incorrect learning.自我歸納自我歸納 lead to意為意為“_”, 后多跟名詞或代詞。后多跟名詞或代詞。導(dǎo)致、造成導(dǎo)致、造成(后果后果)3. too much work and too littl

8、e rest often leads to illness.過量的工作和過少的休息會(huì)引起疾病。過量的工作和過少的休息會(huì)引起疾病。聯(lián)想聯(lián)想 result in引起引起(某種結(jié)果某種結(jié)果)、使獲得、使獲得(某種成某種成果果)、結(jié)果、結(jié)果。如：。如：the accident resulted in two deaths.result from由由造成、因造成、因而產(chǎn)生。如：而產(chǎn)生。如：sickness sometimes results from eating too much.即學(xué)即練即學(xué)即練 用用lead to的適當(dāng)形式完成句子。的適當(dāng)形式完成句子。1. students should alwa

9、ys remember that hard work is the main way which _ success.2. the bad weather _ a terrible accident a few days ago.led toleads to3 they focus on keeping their soil rich and free of disease.focus on:集中集中(注意力，精力等）于注意力，精力等）于olympus: focus on life.奧林巴斯：瞄準(zhǔn)生活。奧林巴斯：瞄準(zhǔn)生活。 you should focus your attention on

10、your work.把注意力集中在你的工作上。把注意力集中在你的工作上。2. focus your camera on those trees.3. im so tired that i cant focus on anything today.把照相機(jī)的焦點(diǎn)集中在那些樹上。把照相機(jī)的焦點(diǎn)集中在那些樹上。今天我太累了今天我太累了, 精神集中不起來。精神集中不起來。focus作名詞作名詞, 意為意為“焦點(diǎn)、中心點(diǎn)焦點(diǎn)、中心點(diǎn)”; because of his strange clothes, he immediately became the focus of attention when he entered the office. 由于他的奇裝異服由于他的奇裝異服, 所以一走進(jìn)辦所以一走進(jìn)辦公室他便成了大家注意的焦點(diǎn)。公室他便成了大家注意的焦點(diǎn)。3. keep free from “遠(yuǎn)離遠(yuǎn)離”或或“避避免免”keep free from emotional reactions 避免激動(dòng)的反應(yīng)避免激動(dòng)的反應(yīng) keep free from restrictions 避免受到限制避免受到限制4. these chemicals in the food supply build up in peoples bodies over t