2019-2020学年新教材高中英语 Unit 2 Wildlife protection Section Ⅲ Discovering Useful Structures课时作业 新人教版必修第二册.doc

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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?Theweatherreportis_being_broadcast

2、ed(broadcast)andIwanttolisten.4．Someonelendsyouhiscarwhileyoursis_being_repaired(repair)atthegarage.5．NewYear'sDayiscomingandChildren'sParkis_being_prepared(prepare)forit.6．Morethanonepatientis_being_taken(take)careofbythenurseatthemoment.7．Themeetingwhichis_being_held(hold)nowisofgreatimportance.8

3、．Sheisoneofthegirlsinourclasswhoare_being_trained(train)forthecomingmatchnow.Ⅱ.阅读理解APassengerpigeons(旅鸽)werethemostcommonbirdsinallofNorthAmericainthe1800s.Itwascommontoseelargegroupsofpassengerpigeons—groupsthatmadeasoundlikeastorm.Buttoday,theyareextinctbecauseofhumanbehavior.Now,somescientistswa

4、nttobringpassengerpigeonsbacktolifebyusingnewtechnologyandscientificideas.Theycallthisprocessdeextinction.Deextinctionhasnothappenedyet.Itisstilljustanidea.Theprocessofdeextinctionisnoteasy.First,scientistsmustcollectDNAfromthebodiesofextinctanimals.Thentheywillputitintheeggsofsimilaranimalspecies.

5、Whentheseanimalsbecomeadults,theywillhavebabies.AndthesebabyanimalswillhavetheDNAoftheextinctanimals.Scientistsbelieveitispossibletobringbackpassengerpigeonsandmanyotheranimals.However,noteveryonethinksthisisagoodidea.StuartPrimmistheworld'sleadingexpertonmodernanimalextinction.Hebelievesthatbringi

6、ngextinctanimalsbacktolifeisbadfortheearth.Ononehand,-9-theseanimalsnolongerhaveasafeplacetolive.Ontheotherhand,theycouldcauseotheranimalstodie.ManyotherscientistsdonotagreewithStuartPrimm.StuartBrand,awriterandscientist,isoneofthem.Hebelievesdeextinctionisgoodformanyreasons.“Thecurrentgeneration(当

7、代)ofchildrenwillexperiencethereturnofsomeunusualanimalsintheirlifetime.Itmaybepartofwhatdefinestheirgenerationandtheirattitudetothenaturalworld.Theywilltaketheirparentstozoostoseethegrowingpopulationsofpass