高中英语人教版必修四教学案Unit 2 Section 4Word文档下载推荐.docx

高中英语人教版必修四教学案Unit 2 Section 4Word文档下载推荐.docx

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4）C．Someoftheproblemscausedbychemicalfertilizers．

答案：

Part1—B　Part2—C　Part3—A

2．Whatdoesthepassagetellus?

Sincechemicalfertilizershavecauseddamage,_farmershaveturnedtoorganic_farming,_usingnatural_wastetokeepthesoilrich．

Ⅱ．Readthepassagecarefullyandchoosethebestanswers．

1．Fromthepassage,wecanseeorganicfarmersarethosewho________．

A．growcropswithchemicalfertilizers

B．growcropswithnaturalfertilizers

C．produceorganicfertilizers

D．carefortheenvironment

2．Fromthefourthparagraph,weknowthat________．

A．it'

snotgoodtoplantgrassbetweencrops

B．peanutsusetheground'

ssurface

C．peasandsoybeansshouldbegrowntogetherwithcornandwheat

D．vegetablesthatputdowndeeprootsareharmfultothesoil

3．Accordingtothetext,whichofthefollowingisNOTtheproblemcausedbychemicalfertilizers?

A．Cropdiseasescanbestopped．

B．Chemicalsstayinthegroundandundergroundwaterforalongtime．

C．Thehelpfulbacteriaandpestsarekilledaswellastheharmfulones．

D．Manyofthesechemicalsaredangeroustopeople'

1～3　BBA

Ⅰ．单词拼写

1．Thenumberofpeoplesufferingfromheartdiseasewillbegreatlyreduced（减少）iftheyarepersuadedtoeatmorefruitandvegetables．

2．Thefocus（焦点）ofpublichealthispreventionandprotectionratherthantreatment．

3．Thespokesmanrefusedtocomment（评论）onthematter．

4．Allthemistakesintheexamhavebeenunderlined（画底线标出）inredink．

5．Bacteria（细菌）areverysmalllivingthings,someofwhichcauseillnessordisease．

6．Goodnutrition（营养）isessentialifpatientsaretomakeaquickrecovery．

7．Itisimportantforyoutoskim（浏览）throughthetext．

Ⅱ．拓展词汇

1．confusevt．使迷惑；

使为难→confusedadj．困惑的；

烦恼的→confusing

adj．令人困惑的→confusionn．困惑；

混乱

2．regretvt．遗憾；

惋惜n．遗憾；

懊悔→regretfuladj．遗憾的；

后悔的→

regretfullyadv．遗憾地；

痛惜地

3．chemicaladj．化学的；

关于化学的→chemistryn．化学

4．mineraln．矿物；

矿石→minen．矿；

矿山

5．productionn．生产；

制造→producevt．生产；

制造→producern．生产者；

制片人

6．discoveryn．发现；

发觉→discovervt．发现→discoverern．发现者

7．summaryn．总结；

摘要；

概要→summarizevt．总结；

概括

[巧记单词]

例词

规律

派生词

regretful

v．＋ful→adj．

confused

v．＋（e）d→adj．

discovery

v．＋y→n．

Ⅲ．补全短语

1．（be）inneedof　　　　　需要

2．causedamageto给……造成损害

3．washoff将……洗掉；

洗净

4．buildup逐渐增强；

建立；

开发

5．leadto导致；

造成（后果）

6．inaddition另外

7．focuson集中（注意力、精力等）于

8．keep．．．freefrom/of使……免受（影响、伤害等）；

使……不含（有害物）

1．[教材原句]Recently,however,scientistshavebeenfindingthatlongtermuseofthesefertilizerscancausedamagetothelandand,evenmoredangerous,topeople'

然而，最近科学家发现长期使用这些肥料会对土地造成损害，甚至更危险的是，会对人们的健康造成危害。

[句型点拨]现在完成进行时表示从过去发生的谓语动作一直持续到现在，强调动作的持续性。

[佳句赏析]TheGradeTwoclasseshavebeenobservingtheplantsaroundtheschoolandfindingtheanimalsthatlivethere．

二年级各班的学生在学校周边观察植物和寻找小动物。

2．[教材原句]Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,makingitreadyforcropssuchaswheatorcornthatneedrichandfertilesoil．

像豌豆或大豆这样的农作物能使土壤重新富含重要的矿物质，这为种植需要肥沃土壤的农作物，如小麦和玉米等做好了准备。

[句型点拨]现在分词短语在句中作结果状语。

[佳句赏析]（2013·

天津高考满分作文）Ontheotherhand,IwillhelpsetuptheEnglishcorner,providingusstudentsaplatformtopracticeouroralEnglish．

另一方面，我将帮着建立英语角，提供给我们学生一个练习英语口语的平台。

CHEMICALORORGANICFARMING?

Overthepasthalfcentury,usingchemicalfertilizershasbecomeverycommoninfarming．Manyfarmerswelcomedthemasagreatwaytostopcropdiseaseandincreaseproduction．Recently,however,scientistshavebeenfindingthatlongtermuseofthesefertilizerscancausedamagetothelandand,evenmoredangerous,topeople'

Whataresomeoftheproblemscausedbychemicalfertilizers?

First,theydamagethelandbykillingthehelpfulbacteriaandpestsaswellastheharmfulones．Chemicalsalsostayinthegroundandundergroundwaterforalongtime．Thisaffectscropsand,therefore,animalsandhumans,sincechemicalsgetinsidethecropsandcannotjustbewashedoff．Thesechemicalsinthefoodsupplybuildupinpeople'

sbodiesovertime．Manyofthesechemicalscanleadtocancerorotherillnesses．Inaddition,fruit,vegetablesandotherfoodgrownwithchemicalfertilizersusuallygrowtoofasttobefullofmuchnutrition．Theymaylookbeautiful,butinsidethereisusuallymorewaterthanvitaminsandminerals．

Withthesediscoveries,somefarmersandmanycustomersarebeginningtoturntoorganicfarming．Organicfarmingissimplyfarmingwithoutusinganychemicals．Theyfocusonkeepingtheirsoilrichandfreeofdisease．Ahealthysoilreducesdiseaseandhelp