人教版高中英语教案Unit 2 Working the land

Unit2Workingtheland

Topic:importantpeople;historyandmethodsofagriculture.

Vocabulary:statistics,sunburnt,struggle,decade,super,output,,crop,hunger,

disturbing,expand,circulate,Vietnam,battle,rid,freedom,therefore,equip,grain,

exportnationality,occupation,confuse,regret,chemical,production,bacteria,pest,

nutrition,mineral,discovery,focus,soil,reduce,root,skim,underline,summary,

comment;thanksto;rid...of;besatisfiedwith;wouldrather;buildup;leadto;focus

on;keep...freefrom/of

Function:I'drather

IfIhaveachoiceIwillchoose

Itisbetterto

Whatistheadvantageof?

Youneedto

Theadvantagesare

IwouldpreferBecause

Thisisgoodvaluebecause

Idon'tlikebecause

Itisagreatpitythat

Youwilltastethedifferencewhen

Grammar:The—ingformasthesubjectandobject

Povertyfactsandstatistics:

1)Halftheworld-nearlythreebillionpeople-liveonlessthantwodollarsaday.

2)TheGDP(GrossDomesticProduct)ofthepoorest48nations(aquarterofthe

world'scountries)islessthanthewealthoftheworld'sthreerichestpeople

combined.

3)Nearlyabillionpeopleenteredthe21stcenturyunabletoreadabookorsign

theirnames.

4)Lessthanonepercentofwhattheworldspenteveryyearonweaponswas

neededtoputeverychildintoschoolbytheyear2000andyetitdidnothappen.

5)1billionchildrenliveinpoverty(1in2childrenintheworld).640million

livewithoutadequateshelter;400millionhavenoaccesstosafewater;270million

havenoaccesstohealthservices.10.6milliondiedin2003beforetheyreachedthe

ageof5(roughly29,000childrenperday)

SomeinformationabouttheWTO(WorldHealthOrganization)andtheFood

andAgricultureOrganizationoftheUnitedNations(FAO)

Thefirstperiod:WarmingUpandReading

Importantpoints:

LetstudentslearnmoreaboutYanLongpingandhishybridstrainofrice.

Getstudentstolearndifferentreadingskills.

Difficultpoints:

Developstudents'readingskills.

EnablestudentstotalkaboutYuanLongpingandhishybridstrainofrice.

Knowledgeaims:

Getstudentslearnsomeusefulwordsandexpressions:statistic,sunburnt,struggle,

decade,super,output,crop,hunger,disturbing,expand,circulate,Vietnam,battle,rod,

freedom,therefore,equip,grain,export,nationality,occupation,thanksto,rid...of,

besatisfiedwith,wouldrather,WorldHealthOrganization

Step1Leadinginandwarmingup

1.Haveafreetalkwithstudentstoodiscussthefollowingquestions.

Haveyoueverbeentocountryside?Whatdidyouseeordothere?

Areyoufromafarmer'sfamily?Whatdoyouknowaboutfarming?

2.Stablefood:

Wheat,rice,corn,bean,

3.Somefarmingsteps:selecttheseeds-*ploughthesoilfturnoverthesoilf

sowtheseeds->removetheweeds-►fertilizefgrowtheyoungplants-►insert

theyoungplants—harvest

Step2Pre-reading

Turntopage10,lookatthetitleofthereadingpassageandthepicturesandthen

predictwhatthepassageisgoingtotalkabout.

1.Letthestudentreadthestatisticsanddiscussthefollowingquestions:

Didyouknowthesefactsbefore?Whatproblemsdotheyshow?

Theworldproducesenoughfoodforeveryone.

Morethan800millionpeoplegotobedhungryeveryday.

2.Letstudentsimagineanddiscussthefollowingquestion:

Whatdoyouthinkwouldhappeniftomorrowtherewassuddenlynoricetoeat?

Step3Reading

1.Fastreading:

Askstudentstoreadthetextfastandthenanswerthefollowingquestions:

Whobecamethefirstagriculturalpioneerintheworldin1974togrowricethathasa

highoutput?

Whatarehisachievements?

(Hisachievements:growsuperhybridricethathasahighoutput;circulatehis

knowledgeabroad;givemoneytoequipothersfortheirresearch.)

2.Intensivereading:Readthepassagecarefullytofindoutthemainideaaboutthe

text:

Findoutthemainideaofeachparagraphandmatchthefollowingheadingswiththe

rightparagraphs:

ParagraphA.DrYuanLongping'sdream.

1

ParagraphB.DrYuanLongping'spersonality.

2一

ParagraphC.DrYuanLongping'sbiography.

3一

ParagraphD.DrYuanLongping'sappearanceandhis

4一achievement.

3.Choosethebestanswersaccordingtothetext:

1).DrYuanLongpinglookslike.

A.ascientistB.astrongmanC.afarmerD.apioneer

2).Whathashebeendoingforsomanyyears?

A.heHasbeenworkinginthericefieldlikeotherfarmers.

B.hehasbeendoingresearchtoraisetheoutputofrice.

C.hehasbeenmanagingalargefarm.

D.hehasbeencarryingoutexperimentinhislab.

3).DrYuanLongping'smainachievementsinhislab?

A.hehashelpedotherless-developedcountries.

B.hehasearnedalotofmoneyfromhisresearch.

C.hehashelpedtheUnitedNationstogetridofhungerintheworld.

D.hehasgreatlyraisedtheproductionofrice.

4).What'shisattitudetomoney?

A.hetrieshisbesttoearnenoughmoney.

B.hethinksthatoneshouldownalargesumofmoneyinhislife.

C.hedoesn'tvaluemoneyverymuch.

D.hehatesmoneyandthinksitisnothing.

(Suggestedanswers:CBDC)

4.Discussandanswerthesequestionsbasedonyourunderstandingofthepassage.

1).WhydidYuanLongpingwanttoincreasethericeoutputwhenhewasyoung?

(Hewantedtoincreasethericeoutputbecausehesawmanypeoplegohungry

whenhewasyoung.)

2).IsYuanLongpingmoreofascientistormoreofafarmer?Doyouthinkheisa

businessman?

(Ithinkheismoreofascientist,althoughheworksinthefieldslikeafarmer.

Hismainpurposeisnottomakeaprofitforhimselfbuttostudyagricultureanduse

thatknowledgetoimprovefarmingforfarmerseverywhere.Idonotthinkheisa

businessman,becausehisgoalisnottomakemoney.)

3).HowwouldyoudescribeDrYuan'spersonality?Usethreeorfouradjectives.

(Becauseofhisworkwithdevelopinghybridrice,itseemsthatDrYuanmustbe

averypatientandcarefulman.Hedidnotgiveupbutkeptworkingonhisproject.

Healsoseemstobeaverykindman,whocaresforothers.Hewantstousehis

inventiontohelphungrypeoplearoundtheworld.)

4).DrYuanwasabletodevelopasuccessfulagriculturalproductwhenthousandsof

otherfannerscouldnot.Whatdoyouthinkisthemainreasonforhissuccess?

(IthinkDrYuanwassuccessfulbecausehekeptworkinganddidnotgiveup.

HewasalsoverymotivatedtosucceedandhelpotherfarmersaroundChina.)

5).DrYuanthinksthatapersonwithtoomuchmoneyhasmoreratherthanfewer

troubles.Doyouagreeordisagree?Why?

(Imostlyagree.Ithinkbeingrichcancausealotofproblems,butitreally

dependsonthelifeandattitudeofthepersonwhoisrich.Peoplewhoarerich

certainlyhavedifferentproblemsfrompeoplewhoarenot.)

6).DrYuandevelopedsuperhybridricetohelpChinesefarmersandhungrypeople

aroundtheworld.Canyouthinkofanyothermajordevelopmentthatwouldmakea

differencetowouldhunger?Writeoutyourideasandthencompareitwithyour

partner.

(Ithinkdevelopingotherhybridgrainswouldmakeagreatdifferenceinthe

problemofworldhunger.Hybridgrainsthatcansurviveinverydryorveryhotareas

wouldbeveryusefulinAfricaandotherareas.Hybridgrainsthatcannoteasilybe

killedbyinsectsanddiseaseswouldbeusefularoundtheworld.)

5.根据课文内容填空。

NameYuanLongping

NationalityChinese

OccupationScientist

AgeHeis82yearsoldin2012.

EducationHegraduatedfromSouthwestAgriculturalCollegein1953.

HobbiesListeningtoviolinmusic,playingmah-jong,swimmingandreading.

LifegoalFindingwaystoincreasericeharvestswithoutexpandingtheareaof

thefields.

DreamsRiceplantscouldbeaswellassorghum.

Hewantstoexporthisricetoothercountries.

AchievementsHedevelopedsuperhybridricewhichproducesone-thirdmoreof

thecropinthesamefields.

Hisricehasmade22%oftheworld'speoplefedfromjust7%ofthe

farmlandinChina.

Heisnowcirculatinghisknowledgeinothercountries.

Step4Post-reading

1.Getstudentstoreadthetextcarefullyandparaphrasesomedifficultsentences.

1).Asayoungmanhesawthegreatneedforincreasingthericeoutput.

2).Atthattime,hungerwasadisturbingprobleminmanypartsoftheworld.

3).Usinghishybridrice,farmersareproducingharvesttwiceaslargeasbefore.

4).Spendingmoneyonhimselforleadingacomfortablelifealsomeansverylittleto

him.

5).Justdreamingforthings,however,costsnothing.

2.Havestudentsingroupsoffourtakeagroupdiscussionandthenreporttothe

class.

Step5Consolidation

1.LetthestudentsustheinformationtocompletethefollowingaboutYuan

Longping.

NameYuanLongping

NationalityChinese

BirthIn1930;inapoorfarmer'sfamily;

OccupationScientistoffarming

EducationSouthwestAgricultureCollege,in1953

PersonalityCarelittleaboutmoneyandfame

DreamHisfirstdream:riceplantsaswellassorghum,eachearofriceas

bigasanearofcorn.Eachgrainofriceashugeasapeanut.

Hisseconddream:toexporthisricesothatitcanbegrownaround

theworld.

AchievementGrowingricethathasahighoutput;circulatinghisknowledge

abroad;givingmoneytoequipothersfortheirresearch.

HobbyListeningtoviolinmusic;playingmah-iong;swimmingand

reading

2.AsksomestudentstoretellthestoryaboutYuanLongpingaccordingtothenotes

above.

Step6Closingdownbyadiscussing

Showthemsomepicturesforthemtoseeandhaveadiscussion:

Forreference:

Themeasurestakentridtheworldofhunger.

Inventanewkindofplanttoproducemorefood.

Findasortoffertilizertogivericeenoughnutrition.

Stopthepollutiontotheenvironmentandprotectthesoilinthefield.

Step7Homework

Learntheusefulwordsandexpressionsbyheart.

Readthereadingpassagecarefullyagainandtrytoretellit.

Thesecondperiod:LearningaboutLanguage:Importantlanguagepoints

Importantpoints:

Enablestudentstograsptheusageofsuchimportantnewwordsandexpressionsas:

struggle,expand,therefore,export,thanksto,rid...ofbesatisfiedwith,wouldrather,

etc.

Getstudentstomasterthepatterns“Thisspecialstrainofricemakesitpossibleto

produceone-thirdmoreofthecropinthesamefields."And"Usinghishybridrice,

farmersareproducingharveststwiceaslargeasbefore.”

Difficultpoints:getstudentstomastersomelonganddifficultsentences.

Step1Revision

Checkthehomeworkexercises.

AsksomestudentstotalkaboutDrYuanLongpingandhissuperhybridrice.

Step2Practiceforsomeusefulwordsandexpressions

Turntopage12andgetthemtodosomeexercises,ifnecessary,givethemsome

explanations.

Step3Studyingimportantlanguagepoints

1.struggle:trytoovercomedifficulty;makegreatefforts.

Thetwoleadersarestrugglingforpower.

Wemuststruggleagainstthisprejudice.

2.makeit+adj./n.+todo

Thefineweathermakesitpossibleforustogoforanoutingtomorrow.

Whereverheis,hemakesitaruletoreadnewspapereverymorning.

Wefounditpleasanttoworkwithher.

Shefeelsitnecessaryforustolearnaforeignlanguagewell.

Iconsideritahonourtohavebeeninvitedtohere.

3.Collectinginformationisveryimportanttobusinessman.

Learningaforeignlanguageisveryusefultome.

searchaplacefor:

Hesearchedherdrawerforthepen.

searchsb.forsth.

Thepolicesearchedthethiefforthestolenwallet.

4.expand:causesth.tobecomegreaterinsize,numberorimportance.

Thebusinesshasexpandedfromhavingoneofficetohavingtwelve.

ThecompanyhasexpandedoperationinStanfordbyopeninganewbranch

officehere.

Theeagleexpandshiswings.

Theshipbuildingindustryisrapidlyexpanding.

5.thanksto:becauseof

Iwaslatethankstothetraffic.

ThankstoMrSmith,Icanwalkaroundagainnow.

ItwasthankstohisadvicethatIsucceeded.

6.rid:makeFreefrom;remove

Ridsb./sth.ofsb./sth.

Be/getridof:becomefreefrom

Youaresupposedtogetridofcarelessness,foritoftenleadstoirretrievable（无法

挽回的）errors.

Theshopordered200copiesofthebookandnowitcan'tgetridofthem.

Hewasaboringman!Iamgladtoberidofhim.

7.形容词原级as...as….的前面可以用表示倍数的词(如half,aquarter,twice,

threetimes等),意思是"是…・•多少倍”

Youarenothalfascleverasyouthinkyouare.

Thebedroomistwiceaslargeasthekitchen.

Wegotfourtimesasmanyguestsaswehadexpected.

8.besatisfiedwith:becontendedwith

FatherisnotatallsatisfiedwithMary'sschoolwork.

Iwasverysatisfiedwiththeresult.

9.careabout:

Sheseldomhastimetocareaboutwhatherhusbandsaysanddoes.

Itisdangeroustogetintothematterbutheseemstocarelittleaboutthat.

10.wouldrather:prefertodosth.

Janewouldratherstayathomethangototheparty.

Iwouldrathertellhimaboutitmyselfthanlethimfinditoutfromother

people.

11.therefore:forthatreason

Iwasill,andthereforecouldnotcome.

Hehasbrokenhislegandthereforehecannotwalk.

Wedon'thaveenoughmoney.Thereforewecannotaffordtobuythenewcar.

12.in/withthehopeof:becauseofthewishfor

Icalledinthehopeoffindingherathome.

Hewenttoseehisbosswiththehopeofgettingariseinhissalary.

Idecidedtotalktoherfatherwiththehopeofpersuadinghimtolethergoto

school.

13.export:sendgoodstoanothercountryforsale

Thiscompanyhasalargehomemarketbutdoesnotexport.

Indiaexportsteaandcottontomanydifferentcountries.

Step5Usingwords,expressionsandpatterns

DotheexercisesinUsingwordsandexpressionsonpage49andthencheck

withthestudentsall.

Step6Homework

Finishofftheworkbookexercises.

Learnthenewwordsandexpressionsbyheart.

Thethirdperiod:Learningaboutlanguage:Grammar

Importantpoints:

Letstudentslearnandgraspwhichverbsarefollowedbythe-ingfromasthe

objectandwhichbytheinfinitive.

Difficultpoints:

Howtogetthestudentstolearnandgraspwhichverbsarefollowedbythe

-ingfromastheobjectandwhichbytheinfinitivebutexpressdifferentmeanings.

Step1Revision

Checkthehomeworkexercises.

Haveadictation:statistic,sunburnt,struggle,decade,super,output,crop,

hunger,disturbing,expand,circulate,Vietnam,battle,rod,freedom,therefore,equip,

grain,export,nationality,occupation,thanksto,rid...of,besatisfiedwith,would

rather,WorldHealthOrganization

Step2Leadingin

1.Askstudentstoturntopage10toreadthroughthepassageAPioneerforall

peole,pickoutthesentencesusingthe-ingformaseitherthesubjectortheobject,

andthenunderlinethe-ingformineachsentenceandtranslatethewholesentence.

1).Sincethen,findingwaystogrowmorericehasbeenhislifegoal.

2).Asayoungman,hesawthegreatneedforincreasingthericeoutput.

3).DrYuansearchedforawaytoincreasericeharvestswithoutexpandingthe

areaofthefields.

4).However,hedoesn'tcareaboutbeingfamous.

5).Heenjoyslisteningviolinmusic,playingmah-jong,swimmingandreading.

6).Spendingmoneyonhimselforleadingacomfortablelifealsomeansvery

littletohim.

7).Justdreamingforthings,however,costsnothing.

8).DrYuanawokefromhisdreamwiththehopeofproducingakindofrice

thatcouldfeedmorepeople.

2.Getstudentsreadanddiscussthesesentencestofindouttherules.

Step3Grammarlearning

1.动词的-ing形式做主语和宾语的用法

1).动词的-ing形式做主语和宾语，既是动名词.

Collectingstampsisagoodhobby.

Heenjoysfishing.

2).动名词依然保持其动词的性质，所以后面可以接宾语或副词性修饰语,

构成动名词短语.

Readingbookswidensourknowledge.

Idonotlikeswimminginapool.

3).动名词既可以作动词宾语，又可以作介词宾语.

Irememberseeingher.

DonotbeafraidofspeakingEnglish.

4).动名词做主语时，谓语动词用单数.

Chattingwiththemimprovesourmind.

2.下列动词后用动名词做宾语：admit,advise,allow,appreciate,avoid,

complete,consider,delay,deny（否认），enjoy,escape,finish,imagine,keep,mind,

miss,permit,postpone（延期），practice,quit（停止），suggest,stop,putoff（推迟），give

up,feellike,keepon,insiston,can'thelp

3.下列动词后接动名词和不定式，意义基本相同：like,love,hate,dislike,

begin,start,cease（停止），continue,intend,prefer（更喜欢）等.

4.下列动词接不定式或动名词，意义有区别.

1）.forget/remember/regret+-ing:已经做了

forget/remember/regret+todosth.还没有做

2）.meantodosth.打算做

meandoingsth.意味着

3）.trydoingsth.尝试做某事

trytodosth.设法做某事

5.动词need,want和require作“需要”时，做宾语的动名词用主动形式

表示被动意义，相当于不定式的被动形式.

Step4Grammarpractice

1.Turntopage13andaskstudentstodotheexercises2-4inDiscovering

usefulstructures.

2.Turntopage50andaskstudentstodoexercises1-2

Step5Askingandanswering

Letstudentsworkinpairs,askingandtellingoneanotherthefollowing:

Whatyoulove/like/hatedoingandwhy.

Whatyouareinterestedindoingsomedayinthefuture.

Whatcityorcountrywouldyouenjoyvisitingandwhy.

Step6Closingdownbyaquiz.

1.fWhatmadeyousoupset?

-►twoticketstothepopmusicconcert.

A.losingB.BecauseolosingC.ToloseD.BecauseIhadlost

2.-►Thereisastoryhereinthepaperabouta110-year-odman.

fMygoodness!Ican'timaginethatold.

A.tobeB.tohavebeenC.beingD.havingbeen

3.Theoldladyneeds.

A.lookafterB.tolookafterC.lookingafterD.beinglookedafter

4.Hehasgotwell-preparedforthejobinterview,forhecouldn'triskthegood

opportunity.

A.toloseB.losingC.tobelostD.beinglost

5.Ican'tstandwithJoaninthesameoffice.Shejustrefusestalkingwhile

sheworks.

A.working;stoppingB.towork;stopping

C.working;tostopD.towork;tostop

6.Ifyouthinkthattrainingawomanwellmeansalwaysherpermissionfor

things,thinkagain.

A.getsB.gotC.togetD.getting

7.Itisnecessarytobepreparedforajobinterview.theanswersreadywillbeof

greathelp.

A.tohavehadB.havinghadC.haveD.having

8.Afterhebecameconscious,herememberedand——ontheheadwitharod.

A.toattack;hitB.tobeattacked;tobehit

C.attacking;behitD.havingbeenattacked;hit

9.Itwasdifficulttoimaginehisthedecisionwithoutanyconsideration.

A.acceptB.acceptingC.toacceptD.accepted

10.Allthestaffinourcompanyareconsideringtothecitycenterforthefashion

show.

A.togoB.goingC.tohavegoneD.havinggone

11.——Lucy,youseemtobesensitiveabouttheneedoftheold.

——Yes.aftermygrandmotherinhospitalhaschangedmealot.

A.LookedB.LookingC.LookD.Tolook

12.—Peopleshouldstoptheircarsandstartusingpublictransport.

——Right.Theroadsaretoocrowdednow.

A.usingB.touseC.useD.tousing

13.IthinkitnopleasurewithstrangersontheInternet.Ienjoywithmy

friendsfacetoface.

A.tochat;talkingB.chatting;totalkC.tochat;totalkD.chatting;talking

14.Therobberscannotescape.Theywillbecaughtbythepolicesooneror

later.

A.punishingB.beingpunishedC.topunishD.tobepunish

15.Theparkisn'tfarawayfromourhome.Mybrother,Jack,suggeststhereon

foot.

A.tohavegoneB.havinggoneC.goingD.togo

16.ThetimeandeffortMrLeehasdevotedfromthepastfewyearstotreesin

thatremoteareaisnowconsideredtobeofgreatvalue.

A.plantB.haveplantedC.plantedD.planting

17.—Doyouregretupyourpositioninthatcompany?

——Yes.IfIwerethere,Iwouldbeachiefmanagernow.

A.givingB.togiveC.givenD.beinggiven

18.——Iwanttotrytennisthisyear.Wouldyouliketoteachme?

——IwouldliketoifIamfree.

A.toplayB.playingC.toplayingD.play

19.InordertoimproveyouroralEnglish,youshouldsetasidesometimetopractice

Englisheveryday.

A.spokenB.speakC.speakingD.havingspoken

20.Canyouimaginethedifficultythegovernmenthadthevillagerstoleave

hereandtosettleintheNorth?

A.persuadeB.topersuadeC.persuadedD.persuading

(Theanswers:ACCBCDDDBBBADBCDABCD)

Step7Homework

1.Finishoffthehomeworkexercises.

2.PreviewthereadingpassageChemicalorganicfarming?Onpage14,findthe

sentencesinwhich-ingformsareused,andseeifyoucanunderstandthem.

Theforthperiod:UsingLanguage:Extensivereading

Inthisperiod,theteachingemphasiswillbeputondevelopingstudents'

readingabilitybyreadingextensively.Wewilldealwithtwopassage:Chemicalor

organicfarminginUsinglanguageonpage14andAnearlyfarmerpioneerin

ReadingTaskonpage52.

Importantpoints:

Developstudents'readingabilitybyextensivereading.

Difficultpoints:

Howtogetstudentstomastertheskillsofscanning,skimmingandenablethem

learntowriteasummaryaftertheirreading.

Knowledgeaims:

Getstudentstolearnsomeusefulwordsandexpressions:chemical,production,

bacteria,nutrition,discovery,focus,soil,reduce,root,skin,pest,underline,summary,

buildup,leadto,keepfreefrom/of,comment

Step1Revision

1.Checkthehomeworkexercises.

2.AskstudentstotranslatethesentencesintoEnglish.

1).出国旅游是很激动人心的.

(Travelingabroadcanbeveryexciting.)

2).在这儿等是没用的，咱们走回去吧.

(Itisnousewaitinghere.Let'swalkback.)

3).我喜欢唱歌，更不用说听音乐了.

(Ienjoysinging,muchmorelisteningmusic.)

4).我记得在哪儿见过你.

(Irememberseeinghersomewhere.)

5).我后悔没有听你的劝告.

(Iregretnotfollowingyouradvice.)

6).即使最聪明的孩子，也需要指教.

(Eventhecleverestchildneedsteaching.)

Step2warmingup

Askstudentswhattheyknowaboutorganicfarming.

Showstudentssomepicturestohelpthemunderstandchemicalandorganicfarming.

Step3Reading

1.Turntopage14,lookatthepictureandthetitleofthepassagetopredictthe

content.

2.Getstudentstoreadthepassagecarefullyandanswerthefollowingquestions.

1).Whyarechemicalfertilizerssopopularinfarmingtoday?

(Becausemanyfarmerswelcomedchemicalfertilizersasagreatwaytostop

diseaseandincreaseproducts.)

2).Whatproblemscanbecausedbyusingchemicalfertilizer?

(Usingchemicalfertilizercanmainlycausethreeproblems.First,theydamage

thelandbykillingthehelpfulbacteriaandpestsaswellasharmfulones.Second,

chemicalsstayinthegroundandundergroundwater,whichaffectscrops,therefore,

animalsandhumans.Inaddition,chemicalfertilizersmakefruit,vegetablesandother

foodgrowtoofasttobeofmuchnutrition.)

3).Whatisorganicfarming?

(Organicfarmingissimplyfarmingwithoutusingchemicals.)

4).Whatisthemainreasonforusingorganicfarming?

(Themainreasonforusingorganicfarmingistogrowgoodfoodandavoid

damagingtheenvironmentorpeople'shealth.)

3.Findandwritedownthemethodsandadvantagesinthepassage.

MethodsoforganicfarmingAdvantagesofmethods

FarmersusenaturalwastefromThismakesthesoilricherinmaterialsandso

animals.morefertile.

TheychangethekindofcropinCropssuchaspeasorsoybeansputimportant

eachfieldeveryfewyears.mineralsbackintothesoilandmakeitrich

andfertile.

TheyplantcropstousedifferentThismakesthewindandwaternotcarrying

levelsofsoil.awavthesoilandalltherichnessofthesoil

used.

4.Askstudentstoreadthetextcarefullytofindoutthecollocations:overthepast

halfcentury,foralongtime,getinside,washoff,foodsupply,buildup,overtime,

chemicalfertilizer,cropdisease,long-termuseof,causedamageto,underground

water,leadto,inaddition,too...to,befullof,turnto,organicfarming,focuson,

keep...freeof,reducedisease,preferdoingsth.naturalwastefromanimals,putdown,

preventfrom,carryaway,avoiddoing,people'shealth

Step4Importantlanguagepoints

1.affect:haveaneffecton;produceeffecton;causesb.tohavingfeelingsofsadness

orsympathy;

Smokingaffectshealth.

Thetaxincreaseshaveaffectedusall.

Shewasdeeplyaffectedbythenews.

2.wash...off:beremovedfromthesurfaceofamaterialbywashing

Thegreasestains（油渍）won'twashoff.

Pleasewashthatmudoffyourbootsbeforeyoucomein.

3.buildup:becomegreater,morenumerousormoreintense

Trafficisbuildinguponroadsintothecity.

Tensionbuiltupasthecrisisapproached.

buildoneself/sb.up:makeoneself/sb.healthierorstronger

Youneedmoreproteintobuildyouup.

buildsth.up:develop,increaseorstrengthensomethinggradually

Buildupafinereputation.

Buildupone'sstrengthafteranillness.

4.leadto:havesth.asitsresult

hardworkleadstosuccess.

Thismisprint（印刷错误）ledtogreatconfusion.

6.focus:centerofactivity,interest;concentrateonsth.

Becausehisstrangeclothes,heimmediatelybecamethefocusofattractionwhen

heenteredtheoffice.

Youmusttrytofocusyourmindonworkandstudy.

Pleaseyourattentionontheteacher'swork.

Iamtootiredtofocusonanything.

7.reduce:makesth.smallerinsize,number,degreeorprice.

Thefirereducedtheforesttoafewtrees.

Thisexperiencededitorissaidtobeabletoreducethemisprintstoalmost

nil（零）

8.prefersth.tosth./preferdoingsth./prefer