高中英语 unit 2 working the land text2学案(创新班)新人教版必修4

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1、Unit2Text2课前预习案一．Phrases1.有机耕种____________2.在过去的半个世纪里_____________3.化肥__________________4.提高产量____________5.给..造成损害_____________6.被洗掉_________________7.随着时间的推移_________________8.逐渐增强，建立，开发_________________9.另外____________10.转向，求助于___________11.集中注意力于____________12.富含________________13.使..免受____

2、________14.每几年_________________15.阻止..干__________________16.避免做____________________二.Readthepassagequicklyandthenanswerthefollowingquestions.1.Themainideaofthepassageis__________.A.Organicfarmersusemanymethodstokeepthesoilfertile.B.Chemicalfertilizerisbetterthannaturalfertilizer.C.Naturalfertil

3、izerisbetterthanchemicalfertilizer.D.Organicfarmerspreferchemicalfertilizerbecauseitcanimprovethesoil.2.Accordingthetext,whichofthefollowingisnottheproblemcausedbychemicalfertilizer?A.CropdiseasescanbestoppedB.Chemicalsalsostayinthegroundandundergroundwaterforalongtime.C.Thehelpfulbacteriaandpe

4、tsarekilledaswellastheharmfulones.D.Manyofthesefertilizersaredangeroustopeople’shealth.3.Whichofthefollowingistrue?A.Organicfarmerspreferchemicalfertilizers.B.Organicfarmerspreferusingnaturalwastefromanimals.C.Allfarmingisorganicfarming.D.Farmersoftengrowthesamecropsyearafteryear.4.Farmers_____

5、____sothatthesoilmayabsorbimportantminerals.A.oftenchangethekindofcropineachfieldeveryfewyearsB.usechemicalfertilizersC.plantcropssuchaspeasorsoybeansD.plantcropstousethesamelevelofsoil5.Howmanywaysdotheorganicfarmershavetokeeptheirsoilfertilizerandhealthy?A.3B.4C.5D.6课内探究案一.Analyzeandtranslate

6、thedifficultsentences1.Thisaffectscropsand,therefore,animalsandhumans,sincechemicalsgetinsidethecropsandcan’tjustbewashedoff.________________________________________________________________.2.Thisalsokeepstheair,soil,waterandcropsfreefromchemicals._______________________________________________

7、___________________.3.Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,makingitreadyforcropssuchaswheatorcornthatneedrichandfertilesoil.______________________________________________________________________.二.课文重点句型填空1