人教版英语选择性Unit3PeriodOneReadingandThinking课时作业（原卷版）

UI.短语填空选词填空reach anagreement;e true;set sail;under themand of;for thebenefit of;in hand;in returnfor;withdraw from

21.It wasa brightclear morningwhen weat lastin theship.

22.As faras Ican see,only byworking hardwill ourdream.

23.The unexpectedinjury forcedhim tothe tournament.

24.The ship,which iscaptain Blake,looks fairlysplendid.

1..1wish Icould dosomething thekindness Ihave receivedfrom him.

26.Despite theprevious roundsof talks,the twosides haventso far.

27.In factwhat he said hasno directrelation tothe matter.

28.This isa benefitto mankind,future generationsof energysavingprojects.w.句型训练（）

29.middle school,I takinga greatbike trip,since自从初中开始，我就一直梦想有一次很棒的自行车之旅（）尽管经理生病了，这次会议还是会按计划进行

30.In spiteof themanagers illness,.as（）尽管他们总是争论甚至争吵，他们仍旧是最好朋友

31.Though theyalways argueor evenquarrel,.remain（定语从句）说实话，这里有太多我绝不会理解的事情

32.To tellyou thetruth,.there be,（非限制性定语从句）我永远不会忘记上周发生的那件事，

33.Never willI forgetthe incidenthappening lastweek,.那给我留下了深刻的印象V.阅读理解（龙纹虾）The entireglobal populationof marbled crayfish hasbeen tracedto asingle femaleheld ina German（水族馆），aquarium whichwas bornwith theability to reproduce withoutmales.Every marbled crayfish isfemale,andevery egglaid isan exactclone ofits mother.The abilitytoreproducequickly withsuch easemade thempopular in theaquarium trade,but whenthey foundtheir wayinto the wild,the crayfishgot out of control.The firstknown marbled crayfish appearedin

1995.Since then,they havespread intothewildand populatedinfreshwater ecosystemsaround theworld.Scientists studyingthis animalhave raisedthe alarmabout itslikely influenceon local wildlife,ecosystems andagriculture asit spreadsinto newenvironments.Successful nonnativespecies likethemarbled crayfishoften causetrouble whenthey arrivein newenvironments,as theycan feedonlocalwildlife orpete withitfor resources.According toDr FrankLyko,a researcherat theGerman CancerResearch Centre,the firstmarbledcrayfishappeareddue to a suddenchange inits parentscells.It wasan animalthat reproducesclonally andtherefore representsa modelof a（肿瘤）central aspectin tumordevelopment.（基因组）“Tumor genomesalso developclonally,because theygo backto asingle originalcell,“hesaid.However,both crayfish and tumorsare stillable to adapt totheir environmentsthrough aprocess termedclonal evolution”,and inbothcases thiscan beharmful.In crayfish,their abilitytoadaptmeans theycan spreadtoavariety ofdifferent（抵抗）environments andclimates,and intumors thismeans theycan developresistance againstcancertargeting drugs.At present,with thepotential influenceof theincreasing marbledcrayfish onlocal places,governments fromdifferentplaces areworking oncontrolling theirpopulation.

34.What doesthe textsay about marbledcrayfishin thewildA.They provepopular.B.They areunder control.C.They canbe troublesome.D.They areoutofcondition.

35.What doesDr FrankLyko tryto explainA.The reasonfbr marbledcrayfishs clonalreproduction.B.The similaritiesbetween marbledcrayfishandtumors.C.The wayto stopmarbledcrayfishcloning themselves.D.The harmfulinfluence marbledcrayfish haveon health.

36.What aregovernments doingaboutmarbledcrayfish nowA.Working onremoving allof them.B.Trying tolimit thequantity of them.C.Taking controlof themwith drugs.D.Connecting themwith harmfultumors.

37.What canbe asuitable titlefor thetextA.Why Marbled Crayfish ReproduceRapidly B.The Populationof MarbledCrayfish IsHuge C.The Spreadof Marbled语法填空Crayfish IsWorrying D.How toControl theNumber ofMarbledCrayfishVI.阅读下面短文，在空白处填入个适当的单词或括号内单词的正确形式138see fromouter space,Earth isa blueplanet,due tothe factthat the ocean coversover70per centof itssurface.According toa newstudy publishedin thejournal Science,the oceanplays agreat rolein39slow downglobal warming.40The NewYork Timesreported,it is“41important缓冲物”.bufferThe oceanscan absorb93per centof theheat trappedby thegreenhouse gaseswhich humansrelease intotheatmosphere.And theother7per cent42absorb bythe air,land andice caps,according toan43analyse.“If the ocean wasntabsorbing asmuch heat,the surfaceoftheland wouldheat upmuch44fast thanit isrightnow,“said professorMalin L.Pinsky atRutgers UniversityintheUS.“In fact,theoceanis savingus fromrapid warmingrightnow.^^However,theoceanitself,as DiscoverMagazine noted,is heatingup40per centfaster onaverage thanthe UnitedNations45believe fiveyears ago.That meansif theocean temperaturesincrease46this speed,the highwater temperatures“will killoff marineecosystems,raise sealevels andmake破坏性的“，47hurricane moredestructive TheGuardian reported.。