高中英语 unit2 using language学案新人教版必修4.doc

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1、unit2usinglanguageWritedownthemainidea(主要大意)foreachparagragh.P1.P2.P3.P4.1.Whatproblemsarecausedbyusingchemicalfertilizers?2.Whyarenaturalfertilizersbetter?Readthetextcarefullyandfillintheblanks.ChemicalFarmingAdvantagesStoppingcropdiseaseandincrease________________ChemicalFarmingDisadvantage

2、sDamagingtheland:killingthehelpful________________Damagingpeople’shealth:◆Manychemicalsinthefoodsupplycanleadtocancerorotherillnesses.◆Foodgrowstoofasttobefullofmuch________.3.Whatspecialwaysoffarmingdoorganicfarmersuse?WhatspecialwaysorganicfarmersdoWhydoso?Usenaturalfertilizers.Changecropse

3、veryfewyears.Growcropsthatneeddifferentlevelsofthesoil.True(T)orFalse(F)．1．Organicfarmerspreferusingnaturalwastefromanimalsandchemicalfertilizers.(　　)2．Usingnaturalwastemakesthesoilricherinmineralsandsomorefertile.(　　)3．Usingorganicfarmingmethodsistogrowgoodfoodandtoavoiddamagingtheenvironmen

4、torpeople’shealth.(　　)4．Usingchemicalfertilizershasbecomeverycommoninfarmingoverthepasthalfcentury.(　　)5．Chemicalfertilizersonlykillharmfulbacteriaandpests.(　　)Discussion:AdvantagesofgreenfoodTakenotes:*tastedelicious*grownin_________air*freeofp___________*_________nutrition*do_______topeople

5、’shealthandthee___________SummaryWhatdowelearntoday?___________________________________________________________