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1、Unit2SavingtheEarthTopic2Alltheseproblemsareveryserious.SectionApollutionmanytreescutdownforestsgonewashtheearthaway冲走changeintodesert转换成，变成沙漠e.g.Alotofrichlandhaschangedintodesertbecausepeoplehavecutdowntoomanytrees.sandstormscomeintobeingn.沙尘暴Theboyandgirlsaretalkingabout—————.differenttypesofsan
2、dstormsthereasonsforsandstormssandstormsindifferentcities1bListento1aandchoosethebestanswer.Focusonthemainideaoftheconversationwhenyoulistenforthefirsttime.√Listenandanswerthequestions1.What’stheweatherliketoday?It’sbad.Thewindissostrong.Andthesandreallyhurtsface.2.Whatcausesthesesandstorms?Peopleh
3、avecutdowntoomanytrees.Asaresult,alotofrichlandhaschangedintodesert.3.Dowestillneedtodosomethingtoprotecttheenvironment?Yes,wedo.Althoughwehavebuilt“TheGreenGreatWall”,westillneedtodosomethingtoprotecttheenvironment.conj.虽然，尽管，即使n.沙somebody,someone,something,somewhereanybody,anyone,anything,anywher
4、enone,nobody,nothing,nowhereeverybody,everyone,everything,everywhere一般情况下用于肯定句一般情况下用于否定句和疑问句表否定含义可用于各种句式theindefinitepronounandadverb1.Ihave____totellyou.A.importantsomethingB.somethingimportantB形容词修饰不定代词和不定副词时，要放在不定代词/不定副词之后Doyouknow?2.Everybody___readyforthematch.A.isB.areA不定代词作主语时，谓语动词要用单数。1aLis
5、ten,lookandsay.1cRead1aandcompletetrees’functions.Treescanstopthewindfromblowingtheearthaway.Alotofwatercanbesavedbyforests.Theycanalsostopthewaterfromwashingtheearthaway.Tree’sfunctionsK:wind;sand;anythingM:sandstormsJ:cutdown;asaresult;changeintoM:affectJ:stop…from…;blow…awayK:canbesavedJ:wash…aw
6、ayK:isharmfulto;although;dosomethingActoutthedialoginpairs2Completethesentenceswiththecorrectformsofthegivenphrasesinthebox.asaresult,changeinto,dosomething,stop…from,blow…away1.Peoplehavecutdownsuchalargenumberoftreesthattheland_____________________desert.2.Therearefewertreesleft,sothewindalways__
7、_____theearth________.3.Airpollutionhasbecomeaseriousproblem,sowemust______________toreduceit.4.weshouldtryourbestto_________people________cuttingdownthetrees.5.Inthefuture,humanbeingscanprotectthetreeswell
