2019_2020学年高中英语Unit2WildlifeprotectionSectionⅢDiscoveringUsefulStructures课时作业.docx

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1、课时作业5　Unit2　SectionⅢ　DiscoveringUsefulStructuresⅠ.单句语法填空1．Toourdelight,manyendangeredspeciesare_being_protected(protect)bythegovernmentnow.2．Daisyhasfoundthatalotofantelopesare_being_hunted(hunt)andkilledforthewoolbeneaththeirstomachsnow.3．Wouldyoupleasekeepsilent?Theweathe

2、rreportis_being_broadcasted(broadcast)andIwanttolisten.4．Someonelendsyouhiscarwhileyoursis_being_repaired(repair)atthegarage.5．NewYear'sDayiscomingandChildren'sParkis_being_prepared(prepare)forit.6．Morethanonepatientis_being_taken(take)careofbythenurseatthemoment.7．Themeeti

3、ngwhichis_being_held(hold)nowisofgreatimportance.8．Sheisoneofthegirlsinourclasswhoare_being_trained(train)forthecomingmatchnow.Ⅱ.阅读理解APassengerpigeons(旅鸽)werethemostcommonbirdsinallofNorthAmericainthe1800s.Itwascommontoseelargegroupsofpassengerpigeons—groupsthatmadeasoundli

4、keastorm.Buttoday,theyareextinctbecauseofhumanbehavior.Now,somescientistswanttobringpassengerpigeonsbacktolifebyusingnewtechnologyandscientificideas.Theycallthisprocessdeextinction.Deextinctionhasnothappenedyet.Itisstilljustanidea.Theprocessofdeextinctionisnoteasy.First,sci

5、entistsmustcollectDNAfromthebodiesofextinctanimals.Thentheywillputitintheeggsofsimilaranimalspecies.Whentheseanimalsbecomeadults,theywillhavebabies.AndthesebabyanimalswillhavetheDNAoftheextinctanimals.Scientistsbelieveitispossibletobringbackpassengerpigeonsandmanyotheranima

6、ls.However,noteveryonethinksthisisagoodidea.StuartPrimmistheworld'sleadingexpertonmodernanimalextinction.Hebelievesthatbringingextinctanimalsbacktolifeisbadfortheearth.Ononehand,theseanimalsnolongerhaveasafeplacetolive.Ontheotherhand,theycouldcauseotheranimalstodie.Manyothe

7、rscientistsdonotagreewithStuartPrimm.StuartBrand,awriterandscientist,isoneofthem.Hebelievesdeextinctionisgoodformanyreasons.“Thecurrentgeneration(当代)ofchildrenwillexperiencethereturnofsomeunusualanimalsintheirlifetime.Itmaybepartofwhatdefinestheirgenerationandtheirattitudet

8、othenaturalworld.Theywilltaketheirparentstozoostoseethegrowingpopulationsofpasseng