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1、Lifeinthefuture李仕才一、阅读理解阅读下面短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。Plastic-EatingWormsHumansproducemorethan300milliontonsofplasticeveryyear.Almosthalfofthatwindsupinlandfills（垃圾填埋场）,andupto12milliontonspollutetheoceans-Sofarthereisnoeffectivewaytogetridofit,butanewstudysuggestsanans
2、wermaylieinthestomachsofsomehungryworms.ResearchersinSpainandEnglandrecentlyfoundthatthewormsofthegreaterwaxmothcanbreakdownpolyethylene,whichaccountsfor40%ofplastics・Theteamleft100waxwormsonacommercialpolyethyleneshoppingbagfor12hours,andthewormsconsumedandbrokedownabout9
3、2milligrams,oralmost3%ofit.Toconfirmthattheworms'chewingalonewasnotresponsibleforthepolyethylenebreakdown,theresearchersmadesomewormsintopaste（糊耳犬物）andappliedittoplasticfilms.14hourslaterthefilmshadlost13%oftheirmass一apparentlybrokendownbyenzymes（酶）fromtheworms'stomachs.Th
4、eirfindingswerepublishedinCurrentBiologyin2017.FedericaBertocchini,co~authorofthestudy,saysthewormsabi1itytobreakdowntheireverydayfood—beeswax—alsoallowsthemtobreakdownplastic.Waxisacomplexmixture,butthebasicbondinpolyethylene,thecarbon-carbonbond,isthereaswell,Hsheexplain
5、s,MThewaxwormevolvedamethodorsystemtobreakthisbond.nJenniferDeBruyn,amicrobiologistattheUniversityofTermessee,whowasnotinvolvedinthestudy,saysitisnotsurprisingthatsuchwormscanbreakdownpolyethylene.Butcomparedwithpreviousstudies,shefindsthespeedofbreakingdowninthisoneexciti
6、ng.Thenextstep,DeBruynsays,wi11betoidentifythecauseofthebreakdown.Isitanenzymeproducedbythewormitselforbyitsgutmicrobes（肠道微生物）？Bertocchiniagreesandhopesherteam"sfindingsmightonedayhelpemploytheenzymetobreakdownplasticsinlandfi1Is・Butsheexpectsusingthechemicalinsomekindofin
7、dustrialprocess—notsimplynmillionsofwormsthrownontopoftheplastic.M1.Whatcanwe1earnaboutthewormsinthestudy?A.Theytakeplasticsastheireverydayfood・B・Theyarenewlyevolvedcreatures・C・Theycanconsumeplastics・D.Theywindupinlandfills.2.AccordingtoJenniferDeBruyn,thenextstepofthestud
8、yistoA.identifyothermeansofthebreakdownB.findoutthesourceoftheenzymeC.confirmtheresearchf
