高中英语《Unit 2 Working the land》period 3 新人教版必修4.ppt

Period 3; chemical production bacteria pest nutrition mineral ; discovery focus soil reduce root ; build up lead to focus on keep… free from/of;First reading Read the passage , then find out the main idea of each paragraph.;;1.What is organic farming?;;Third reading Read the text again, and fill in the following forms.;2.The soil is not exhausted.;What is the disadvantage of using chemical fertilizers?;Language points;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。 ;Writing; 1,600 years ago the Chinese writer Jia Sixie wrote a book Qi Min Yao Shu about good agricultural practices. Today some of Jia Sixie’s ideas are still very useful to our modern times, but we have some problems today that he never had in his time.; However, we have some problems today that Jia Sixie never faced in his time. We have environmental pollution that harms fields and crops. We have great competition in the marketplace. We have new, dangerous and powerful crop diseases.;Exercises 选词填空 （ occupation, job, profession, work ) a. Please state your name,age and_________ below. b. I have a few _____ to do in the house this morning. c. Looking after children all day is hard____ d. My husband is at the very top of medical____________ . ;完成句子： Stop talking and ________________________ . ( 专心工作 ) b. Everyone ____________________ ( 集中注意力 ) when they have an exam. c. I decided to ________________________ ( 全力以赴 ) finding somewhere to live. ;2. Difficulties;Homework