人教版book4unit2usinglanguagereading课件.ppt

Book4 Unit 2 Using Language;;;Now, which one do you prefer?;;;Goals;Task1: Read and match the main idea of each paragraph.; Part 1 (Para.1-2) Chemical farming part 2 (Para. 3-4) Organic Farming;Task2: Para 1. Read and answer.;Task4: Para. 2 Read and fill the form.;Task5: Para. 3 True or False;To make the soil richer in minerals and therefore makes it more fertile.;Changing the kind of crop in each field every few years.;;;Situation 1: The farmer is using fertilizers to keep the vegetable free from pest.;Situation 2: Lao Wang grows soybeans in his field last year and grows corns this year.;Situation 3: Lao Li throw the nitrogen fertilizer(氮肥) in his field to make his soil rich in minerals.;Situation 4: Li Hua only use natural fertilizers to grow his cabbage. That’s why his cabbage is damaged by pests.;;;The advantages of Organic farming;A stubborn farmer’s idea: Chemical Farming is better.;Homework: ;