高二英语unit9 saving the earth同步练习

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1、高二英语Unit9Savingtheearth同步练习I.SpeakingTask1Ourearthisindanger!Directions:Herearethemajorproblemsfacingtheearth.Workwithyourpartnerandfigureoutthecausesandpossiblesolutions.ProblemsCausesSolutions1.waterpollution2.Trash/garbage3.Airpollution4.Deforestation(采伐森林)5.Desertification(

2、沙漠化)6.Hunger7.Deadlydiseases8._____________Task2What’sthebiggestproblem?Directions:Amongtheproblemslistedabove,whichdoyouthinkisthebiggestone?Ifyoupartnerdisagrees,thenyou’llhavetopersuadehim/her.Task3Polarbears’problem.Directions:Gothroughthefollowingpassageandfinishoffthetask

3、s.1.Completethetextwiththephrases:A.onaverage;B.waitfor;C.livethrough;D.beforcedto;E.liveawayfrom;2.Whyarepolarbearsgettingthinner?3.Isitgoodforbearstogetthinner?Aretheygoingtodieout?4.Besidespolarbears,whatotheranimalsdoesthewarminguphaveeffecton?5.Whatarethepossiblecausesofth

4、eclimategettingwarmer?Whatcanbedonetostopit?Polarbearsaregettingthinner.Itisnotadietanditisnotbecausethereislessfoodtocatch.Itisbecausetheworldisgettingwarmer.GiantwhitebearsthatliveinthenorthofCanadaareatthemomentimpatiently(1)icetoform.Theyneedtheicetoforma"bridge"totheirfood

5、—seals.Sealsusually(2)landamongtheicebergs.However,astheclimatebecomeswarmer,winterisgettingshorterandseaiceisdecreasinginthearea.Thisismakingpolarbears'livesincreasinglydifficult.Bearsneedtoeatasmuchfoodaspossibleinthewintertomakethemselvesfatenoughto(3)fivemonthswithoutfoodin

6、thesummerandautumn.Duringthefive-monthice-freeseason,thebears(4)fast(绝食)."Foreveryweekabearhasnotbeenhuntingfoodonice,itis10kilogramslighter,"saidascientist.Theaveragetemperatureoftheregionhasrisenfrom0.3to0.4degreescentigradesince1950.Withthechangeoftheclimate,theseaiceismelti

7、ngearlierinthespring.Thusthehuntingseasonforbearsisgettingshorter.Andthebears,(5),weighbetween80and85kilogramslessthantheydidin1985.II.Understandingthetext1.WhichisTRUEabouttheEarthSummit?A.It’sheldevery3yearsinStockholm,SwedenB.Sofarithasbeenheldtwice:in1972andin2002C.‘Sustain

8、abledevelopment’istheonlythemeofthesummitD.Atthesummit