姜Book4Unit2_Using_language

1、Unit 2Working the land chemical discovery focus focus soil reduce root production bacteriaWords previewadj. 化学的；关于化学的化学的；关于化学的n. 发现；发觉发现；发觉n. 焦点；中心点焦点；中心点vt. 集中；聚焦集中；聚焦n. 土壤土壤vt. 减少；减缩减少；减缩n. 根；根源根；根源n. 生产；制造生产；制造n. 细菌细菌Words previewn. 害虫；害兽；害鸟害虫；害兽；害鸟n. 营养；滋养；食物营养；滋养；食物n. 矿物；矿石矿物；矿石vt. 浏览；略读浏览；略读vt

2、. 画底线标出；强调画底线标出；强调n. 总结；摘要；概要总结；摘要；概要n. 评论；议论评论；议论v. 表达意见表达意见;做出评论做出评论 pest nutrition mineral skim underline summary comment commentorganic fertile fertilizeradj.有机的；器官的有机的；器官的adj.肥沃的；富饶的肥沃的；富饶的n.肥料；化肥肥料；化肥Words previewFind the phrases in the text 1. 化肥化肥2. 对对造成损害造成损害3. 洗掉某物洗掉某物4. 导致导致; 造成造成(后果后果);

3、通往通往5. 逐渐增强逐渐增强, 建立建立6. 另外另外(还有还有)7. 使使免受免受(影响影响);8. 集中集中(注意力、精力注意力、精力)于于9. 每隔几年每隔几年10. 避免做避免做chemical fertilizerscause/do damage towash offlead tobuild upin addition (to)keepfree from/offocus onevery few yearsavoid doingPost ReadingIt is fertilizer. What is the substance which farmers put on the so

4、il to make crops grow?There are_kinds. They are_fertilizers and_ ones. How many kinds of fertilizers do farmers use?twochemicalnaturalReadingCHEMICAL OR ORGANIC FARMING?This passage tells us something about _. _can cause many problems, so _ is becoming more popular.The main idea of the text:Chemical

5、 fertilizersorganic farmingorganic farmingLong-term use of chemical fertilizers can cause damage to the land and peoples health.Problems caused by chemical fertilizers.The main idea of each paragraphPara_Para_ The advantages of organic farming.Para_Para_Other methods to keep the soil fertile. 42311

6、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 purpose for using organic farming methods? Careful ReadingRead the passage and answer the following questions.1 Why are chemical fertiliz

7、ers so popular in farming today? Because they are a great way to stop crop disease and increase production. 2 What problems are caused by using chemical fertilizers?They kill both helpful and harmful bacteria and pests. They affect crops, animals and humans.Fruits and vegetables grown with chemical

8、fertilizers grow too fast and contain fewer vitamins and minerals. 3 What is organic farming?4 What is the main purpose for using organic farming methods? It is farming without using any chemicals.To grow good food and to avoid damaging the environment or peoples health. 1. Which is not the reason w

9、hy organic farmers prefer natural waste from animals? A. It can keep the food free from chemicals. B. It can keep the air, soil and water free from chemicals. C. It can kill harmful pests. D. It can make the soil richer in mineral.Choose the best answer. 3. The organic farmers do the followings exce

10、pt _.A. adding fertilizers which is rich in mineralsB. changing crops every two or three yearsC. planting seeds in different layers of the soilD. planting grass between crops to prevent the soil from being blown awayLanguage points1. These chemicals in the food supply build up in peoples bodies over

11、 time.build up 逐渐增强逐渐增强; 建立；开发建立；开发 Hard working conditions build up character. 艰苦的工作条件能磨练人的性格。艰苦的工作条件能磨练人的性格。常见搭配：常见搭配：build up ones body/muscles锻炼身体锻炼身体 build up ones strength 增强体力增强体力build up ones health 增进健康增进健康 2. every+基数词基数词+复数名词复数名词：每；每隔 every+序数词序数词+单数名词单数名词：每; 每隔 every six days=every sixth

12、 day every + other+单数可数名词单数可数名词：每隔一 every other day every + few+复数名词复数名词：每隔几 every few years every two days = every second day=every other day当堂检测当堂检测 1.Practising Chinese kung fu can not only _ ones strength, but also develop ones character. A. bring up B. take up C. build up D. pull up2. The road

13、_ the city is lined with trees. A. lead to B. result from C. result in D. leading to3. Toms weight was reduced _ 2 kilograms last year. A. by B. to C. from D. in 4. _ the table _ dirt by putting a cover over it. A. Keep; away from B. Keep; free from C. Keeping; free from D. To keep; away from5. As a

14、 student, you should _(集中精力于集中精力于)your study.6. He went home _.(每两天；每隔一天) focus your attention onevery two days/every second day/every other day课后巩固课后巩固 cause/do damage to, wash off, lead to, bulid up, in addition(to), keepfree from/of, focus on,avoid doing1. His mistakes _ his failure.2. These chem

15、icals in the food supply_ in peoples bodies over time.3. All roads _ Rome.4. Please _ your mind _ the following problem.5. Children should _ violence.led tobuild upfocusonlead tobe kept free from6. He likes basketball. _, he likes football. That is,he likes basketball _ football.7. Little Tom stuck

16、to _ the mud _ his shoes by himself before he came in. 8. I tried to _ (meet) him because he always bores me.9. The storm on May 3 _ great _ people in Burma so far.cause/do damage to, wash off, lead to, bulid up, in addition(to), keepfree from/of, focus on,avoid doingIn additionin addition towashing

17、offavoid meetinghas causeddamage toII. 用适当的介词填空。用适当的介词填空。1. Costs have been reduced _ 20% over the past year. 2. You can focus your telescope _ that distant television tower.3. I hope I havent kept you _ your work.byonfrom4. He made no comments _ what I said at the meeting.5. “Green food” is grown a

18、way _ industrial areas and dirty water supplies.from on / about阅读表达阅读表达 一答案：一答案：76Face the stress.77The best way that/in which/ you deal with the stress is to have a balanced life.78You may not feel well79Sleep, Exercise. Leisure, and Food.（至（至少答少答 到其中三点）到其中三点）80You have ever been so worried about something that you have a headache or even cant sleep at night.阅读表达二答案：阅读表达二答案：n76. Chocolates and personality/Choi