浙江省草塔中学：Unit2Workingtheland（ListeningandWriting）课件（人教版必修四）.ppt

Listening on Page 48;What make the worlds deserts grow?;Do you remember the poem? 天苍苍，野茫茫，风吹草低见牛羊。;Listen to the tape and tick what you hear. Heat and little rain. Turning forests into farmland. Overusing fields to feed farm animals. Using new scientific farming methods. Wasting water in farms and at home. Farming too much on poor land. ;Listen to the tape again and choose the best answer to each question.;2. How does farmland turn into desert? Wind blows away dry soil and then the land becomes sandy. Hot weather makes the land become sandy. C. Too many plants can make farmland become desert.;3. How are new farming methods helping to stop the desert in Xinjiang? A. The methods let the farmers use les water. B. The methods let farmers grow the same amount of crops in less land. C. The methods do not use fertilizers.;1. Look at the map and the sentences below. Which area do you think the sentences describe? Write your guesses next to the sentences.;1 ____ ____ Ancient farmers in this area used teams of oxen for ploughing the fields. 2 ____ ____ Farming here was famous for developing a system of watering fields from the River Nile. 3 ____ ____ This area has a system of growing three crops together. The crops are not only good for food but also help make the soil fertile.;4 ____ ____ Farmers here cut large steps into the sides into the hillsides and created islands to get more land for growing crops.;2. Now listen to this student’s report on ancient farming and match the descriptions with the sites on the map.;1 B Middle East 2 A Egypt 3 C North America 4 D Central America;3. Listen to the tape again and discuss the following questions in groups of four.;2. What do you know about farming developments in ancient China? Do you know who had great influence on developing good farming methods in ancient China?;◎Writing Task on Page 53.;Sample writing:; Some of Jia Sixie’s ideas are still very useful to our modern times. Farmer still clear their fields of weeds.