Using language.doc

Unit 2 Using languageI. Read the passage and answer the following questions.读课本14页的课文，回答下面问题。1. Why are chemical fertilizers so popular in farming today?2. What problems can be caused by using chemical fertilizers?3. What is organic farming? 4. What is the main reason for using organic farming methods? II. Read the text again and fill in the blanks.Chemical FarmingAdvantagesStopping crop disease and increase _Chemical FarmingDisadvantagesDamaging the land: killing the helpful _ Damaging peoples health:Many chemicals in the food supply can lead to cancer or other illnesses.Food grows too fast to be full of much _.Organic farming_To grow good food and avoid damaging the environment or peoples healthOrganic farmingMethodsUsing _ waste from animals as fertilizerChanging _ in each field every few years Using _ of soil to plant crops Planting _ between cropsIn what condition do you think green food grow?Main idea of the passage Structure of the textORGANIC FARMINGI 、 Using chemical fertilizers for a long time can hurt the land and also peoples health.II、 Problem caused by chemical fertilizers：1. 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.、 Organic farming is becoming more popular with some farmers and many customers after these discoveries came out. IV、 Other methods to keep the soil fertile.Language points语言点1. lead to用法寓词于境 阅读下列句子，注意lead to的意思和用法。1. His carelessness led to the accident.2. This test is obviously bad because it leads to incorrect learning.3. Too much work and too little rest often leads to illness.自我归纳 lead to意为“_”, 后多跟名词或代词。导致、造成(后果）联想 result in引起(某种结果)、使获得(某种成果)、结果。如：The accident resulted in two deaths.result from由造成、因而产生。如：Sickness sometimes results from eating too much.即学即练 用lead to的适当形式完成句子。1. Students should always remember that hard work is the main way which _ success.2. The bad weather _ a terrible accident a few days ago.leads toled to2. focus用法 根据语境推断focus在下列句子中的含义, 并从a-d中找出与每句话中的focus相符合的英文释义。1. The focus of the meeting changed from population growth to the education of women.2. Bring the object into focus if you want a clear photograph. 3. She tried to focus her mind on her work.4. She turned the camera and focused on Martins face.a. the thing, person, situation, etc. that people pay special attention tob. a point or distance at which the outline of an object is clearly seen by the eye or through a lensc. to point a camera at something, and change the controls slightly so that you can see that thing clearly d. to give special attention to one particular person or thing, or to make people do thisfocus作名词, 意为“焦点、中心点”; 作动词, 意为“集中、聚焦”, 常构成短语focus on, 意为“集中(注意力、精力等)于”。翻译下列句子。1. Because of his strange clothes, he immediately became the focus of attention when he entered the office. 由于他的奇装异服, 所以一走进办公室他便成了大家注意的焦点。2. Focus your camera on those trees.把照相机的焦点集中在那些树上。3. Im so tired that I cant focus on anything today.今天我太累了, 精神集中不起来。3. keep free from “远离”或“避免”keep free from emotional reactions 避免激动的反应 keep free from restrictions 避免受到限制 4. 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. 分析 本句结构比较复杂。其主干结构为: 主句(Crops put important minerals back into the soil) + 状语(making it ready for crops)。状语中又包含“make + it + 形容词”结构和由that引导的定语从句(that need rich and fertile soil)。 5. Some organic farmers prefer planting grass between crops to prevent wind or water from carrying away the soil, and then leaving it in the ground to become a natural fertilizer for the next years crop. 分析本句的主干结构是一个简单句, 其结构是: 主语(farmers) + 谓语(prefer