Words preview

1. Words preview chemical production bacteria pest nutrition mineral adj. 化学的；关于化学的 n. 生产；制造 n. 细菌 n. 害虫；害兽；害鸟 n. 营养；滋养；食物 n. 矿物；矿石

2. Words preview discovery focus soil reduce root n. 发现；发觉 n. 焦点；中心点 vt. 集中；聚焦 n. 土壤 vt. 减少；减缩 n. 根；根源

3. Words preview skim underline summary comment vt. 浏览；略读 vt. 画底线标出；强调 n. 总结；摘要；概要 n. 评论；议论 vi.& vt. 表达意见; 做出评论

4. Expressions preview build up lead to focus on keep… free from/of 逐渐增强; 建立; 开发 导致; 造成 (后果) 集中 (注意力，精力等) 于 使…免受(影响，伤害等)； 使…不含(有害物)

5. Unit 2 Chemical or organic farming

6. 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? Read the passage and answer the following questions.

7. 1 Why are chemical fertilizers so popular in farming today? They are a great way to stop crop disease and increase production.

8. 2 What problems can be caused by using chemical fertilizers? They do hto the land and, even more dangerous, to people’s health. They can d_____ the land by k. helpful bacteria and pests. Chemicals also stay in the ground and underground water for a long time. These chemicals in the food stheir bodies over time and cancer or other illnesses. In ,food grown with chemical f ,usually grow too fast to be full of much n . They may look beautiful, but inside there is usually more water than vitamins and minerals. arm amage illing upply build up lead to addition ertilizer utrition

9. 3 What is organic farming? 4 What is the main reason for using organic farming methods? Organic farming means growing crops without using any chemicals. The main reason for using organic farming methods is to grow good food and to avoid damaging the environment or people’s health.

10. 学海导航P35

11. Homework 1.两张报纸,第三期PART3 2.会考作文的分析 3.回来晚上听写整个单元

12. Words preview chemical production bacteria pest nutrition mineral adj. 化学的；关于化学的 n. 生产；制造 n. 细菌 n. 害虫；害兽；害鸟 n. 营养；滋养；食物 n. 矿物；矿石

14. Organic Farming find out the main idea of each paragraph. What is organic farming? Para 1: Para 2: Para 3: Farmers prefer natural waste from animals. Farmers change crops every two or three years.

15. Find and write down the methods and advantages in the passage.

18. Language points 1 These chemicals in the food supply build up in people’s bodies over time. build up  增强; 建立；开发 Hard working conditions build up character. 艰苦的工作条件能磨练人的性格。

19. 2 Many of these chemicals can lead to cancer or other illnesses. lead to: 导致；造成 Too much work and too little rest often lead to illness. 过量的工作和过少的休息会引起疾病。 All roads lead to Rome.  条条大道通罗马。

20. 3 They focus on keeping their soil rich and free of disease. focus on:集中(注意力，精力等）于 You should focus your attention on your work.把注意力集中在你的工作上。 Olympus: Focus on life.奥林巴斯：瞄准生活。

21. 4 This also keeps the air, soil, water and crops free from chemicals. keeps… free from /of: 使…免受（影 响，伤害登）；使不含（有害物） keep from:  阻止; 妨碍 I hope you will keep from doing anything rash.  我希望你不要做出任何鲁莽的事情来。

22. Listening

23. 用化学肥料和有机肥料的区别: cow dung chemical fertilizer

24. The possible bad effects of chemical fertilizers on the fruit and vegetables that we eat today. As you listen to this dialogue, keep in mind what you have just read about chemical fertilizers. What is the main topic of the conversation?

25. Listen to the dialogue a second time. Decide if the following statements are true or false, according to the conversation. Give your reasons. 1 Paul thinks that Carrie is not telling him the truth. 2 Using chemical fertilizers always makes vegetables empty inside. True False

26. 3 Today’s 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 today’s vegetables look healthy but in fact are not. True False True

27. Listening text WHAT’S WRONG WITH THE VEGETABLES? Girl: Hey, Paul, listen to this … a magazine article about a farmer who used too much chemical fertilizer on his fields. When his vegetables were picked, they were all found to be empty!

28. BOY: Empty? You’re joking, Carrie … that can’t be true! Girl: I didn’t believe it either! This article says this can happen sometimes with vegetables like cucumbers, carrots and pumpkins. This chemical fertilizer makes the vegetables grow fast to look big and beautiful, but they’re empty inside!

29. BOY: You know, I’ve noticed that sometimes my mum buys carrots from the supermarket that have big holes down the center. I guess that must be from using chemical fertilizers! GIRL: Yeah, that’s what the magazine says! The main point of the article, though, isn’t about holes in our vegetables.

30. It’s talking about why the fruit and vegetables we eat today aren’t as nutritious as the ones our grandparents ate. BOY: What? My mum is always telling me to eat more vegetables, because they’re good for me! GIRL: Yeah, I know – my mother says that same thing! And it’s true -

31. they are good for us… but the problem is that they aren’t healthy enough! All these chemical fertilizers – they kill off both the bad and the good things in the ground. The ground doesn’t have enough vitamins and minerals any more to help crops grow healthy.

32. BOY: So … if our fruit and vegetables were grown with chemical fertilizers, they might look healthy, but probably aren’t really healthy? I guess we’ve got to stop using so many chemical fertilizers to grow our food!

33. Write a summary of the text following the procedure on page 15. Homework

34. Thank you.