高中英语module4教学资料unit2usinglangaug.ppt

_ was a disturbing problem in most parts of China in the past,and _was a great need to increase the rice output.So finding ways to grow more rice has been Yuan Longpings life_,since he graduated from college.He did his research by _ the land,which accounted for his _ face and arms.After struggling for decades,he grew what is now called _ hybrid rice.This special strain of rice makes it possible to produce 20%_ of crop in the same fields._ his research,the UN has more tools in the battle to _ the world of hunger.Now Dr.Yuan is _his knowledge in some less developed countries.He even hope to _his rice so that it can be grown around the world.HungertheregoalworkingsunburntsupermoreThanks toridcirculatingexportReading on P14 What is it that we put on the soil which makes crops grow?It is fertilizer.How many kinds of fertilizers do farmers use?There are two kinds.They are chemical fertilizers and natural ones.Which kind of fertilizer do farmers use when they are doing organic farming?ORGANIC FARMING Organic farming is simply farming without using any chemicals.Read the text and fill in the blanks.Chemical FarmingAdvantages Stopping crop _ and increasing _productiondiseaseChemical FarmingDisadvantagesDamaging the land:killing the helpful bacteria and pests as well .Chemicals stay in ground and underground water for a long timeChemicals getting inside the crops cannot be washed away,and build up in peoples bodiesDamaging peoples health:Many chemicals in the food supply can lead to cancer or other illnesses.Food grows too fast to be full of much nutrition.Advantages of organic farming1.keep the soil rich and free of disease2.a healthy soil reduces disease and helps crops grow strong and healthy.3.make the soil richer in minerals and more fertile.4.keep the air,soil,water and crops free from chemicals.5.grow good food and avoid damaging the environment or peoples health.Organic FarmingMethodsUsing _waste from animals as fertilizerChanging _ in each field every few yearsUsing _ of soil to plant crops Planting _ between cropsgrassnaturalthe kind of cropdifferent levelsMain idea of the passageChemical fertilizers can cause many problems,so organic farming is becoming more popular.A summaryIn recent days,scientists have discovered that _ chemical fertilizers for a long time can hurt the land and also peoples health.There are several problems _ by chemical fertilizers.They _ the land,_ in the ground and underground water for a long time and get into peoples bodies through their_.Organic farming is becoming more popular _someusingcauseddamagestayfoodwithfarmers and many customers after these discoveries came out.Organic farming does not use any_.Organic farmers use many _ to keep the soil fertile.All of these methods try to produce good food and _ causing damage to the environment or peoples health.chemicalsmethodsavoidLearn to use ing forms as the subject and objectHow to use-ing form as the object1.Jane Goodall saw chimps either feed or clean each other as a way of _(展示爱展示爱)in their family.2.She looks forward to _(看见看见)all the animals being respected by human beings.介词后需用动名词作宾语。介词后需用动名词作宾语。showing loveseeing3.I looked forward _(see)how far I had to run.to see(1)The story of Dr Yuans working the land has moved many people.How to use-ing forms as the object动名词的逻辑主语可由其前加一物主代词、动名词的逻辑主语可由其前加一物主代词、名词的所有格、或人称代词的宾格表示。名词的所有格、或人称代词的宾格表示。How to use-ing forms as the object(1)How to avoid the area of the fields being expanded is a problem to us.(2)In his speech he never mentions having become an agricultural pioneer in the world.关注动名词与其逻辑主语间的主被动关关注动名词与其逻辑主语间的主被动关系及时间。系及时间。_ was a disturbing problem in most parts of China in the past,and _was a great need to increase the rice output.So finding ways to grow more rice has been Yuan Longpings life_,since he graduated from college.He did his research by _ the land,which accounted for his _ face and arms.After struggling for decades,he grew what is now called _ hybrid rice.This special strain of rice makes it possible to produce 20%_ of crop in the same fields._ his research,the UN has more tools in the battle to _ the world of hunger.Now Dr.Yuan is _his knowledge in some less developed countries.He even hope to _his rice so that it can be grown around the world.HungertheregoalworkingsunburntsupermoreThanks toridcirculatingexportA summaryIn recent days,scientists have discovered that _ chemical fertilizers for a long time can hurt the land and also peoples health.There are several problems _ by chemical fertilizers.They _ the land,_ in the ground and underground water for a long time and get into peoples bodies through their_.Organic farming is becoming more popular _someusingcauseddamagestayfoodwithfarmers and many customers after these discoveries came out.Organic farming does not use any_.Organic farmers use many _ to keep the soil fertile.All of these methods try to produce good food and _ causing damage to the environment or peoples health.chemicalsmethodsavoidORGANIC FARMINGStructure of the textPara.1 Using chemical fertilizers for a long time can hurt the land and peoples health as well.Para.2 Problem caused by chemical fertilizers1.Damage the land by killing the helpful bacteria and pests as well as the harmful ones2.Lead to cancer or other illness.3.Food grown with chemical fertilizers look beautiful,but inside there is usually more water than vitamins and minerals.Para.3 Organic farming is becoming more popular with some farmers and many customers.Para.4 Other methods to keep the soil fertile._ was a disturbing problem in most parts of China in the past,and _was a great need to increase the rice output.So finding ways to grow more rice has been Yuan Longpings life_,since he graduated from college.He did his research by _ the land,which accounted for his _ face and arms.After struggling for decades,he grew what is now called _ hybrid rice.This special strain of rice makes it possible to produce 20%_ of crop in the same fields._ his research,the UN has more tools in the battle to _ the world of hunger.Now Dr.Yuan is _his knowledge in some less developed countries.He even hope to _his rice so that it can be grown around the world.HungertheregoalworkingsunburntsupermoreThanks toridcirculatingexportA summaryIn recent days,scientists have discovered that _ chemical fertilizers for a long time can hurt the land and also peoples health.There are several problems _ by chemical fertilizers.They _ the land,_ in the ground and underground water for a long time and get into peoples bodies through their_.Organic farming is becoming more popular _someusingcauseddamagestayfoodwithfarmers and many customers after these discoveries came out.Organic farming does not use any_.Organic farmers use many _ to keep the soil fertile.All of these methods try to produce good food and _ causing damage to the environment or peoples health.chemicalsmethodsavoidListening Listening Listening on Page 15 What is the main topic of the conversation?The possible bad effects of chemical fertilizers on the fruit and vegetables that we eat today.1.Paul thinks that Carrie is not telling him the truth.2.Using chemical fertilizers always makes vegetables empty inside.3.Todays fruit is not as healthy for people as fruit fifty years ago.4.Eating more vegetables might not always be good for us.5.All of todays vegetables look healthy but in fact are not.Listening T FT FT