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1、TheZebraFinch：AnOwner’sGuidetoaHappyHealthyPet阅读理解答案 阅读理解TheZebraFinch：AnOwner’sGuidetoaHappyHealthyPet Thezebrafinch，anativeofAustralia，isapopulardomesticpetintheUnitedStates.Thebirdhasmanyattributes(特性)whichallowittobekeptathome，thoughtherearealso
2、afewnegativeaspects.Theattributesarenest-building，breedingandalivelyattitude.Thepotentialnegativesareover-breedingandthewildnessofthebirds. Oneofthemainattributesofzebrafinchesistheirabilitytobreed.Theyaretherabbitsofthedomesticbirdworld.Onceyouhavet
3、wobirds,maleandfemale,youwillsoonhavesix,astheybreedquiteeasilyandhavestrongbabies,usuallyfouratatime.Anaddedattributeistheirabilitytobuildtheirownnests.Youcanplacebranchintheirplacealongwithsomekindofstructure,andtheywillcreateanestontheirown.It’sver
4、ypleasanttoseethewaysmalesandfemalesdividesomelaborsandshareothers,andthebabiesgrowupquickly.Overall,zebrafinchesareenerg eticbirds,andtheycanmakeeveryplacewheretheylivedelightfullives. Onthenegativeside,theywillbreedandin-breed.Often,in-breedingd
5、oeslittleharmanddoesnotcausegeneticdefects(缺陷），ashappensmoreofteninotherspecies.However,noonecantoleratejustanypopulationlevel.Onehastoeitherremovetheirnests altogether,whichbasicallyremovestheirpersonallivingplace,orcheckforeggsregularlyonceaweek(th
6、egestationperiod妊娠期is13days,soevenaone-weekneglectcanleadtobirths).Eggscanbereplacedwithfalseplasticeggs，andthispreventsfemalesfromlayingtoomany.Iftheydolaytoomany,theywilldiefrommineralloss.Sincethesebirdsdonottamewell,removingeggscanbeanunpleasantpr
7、ocessofrepeatedlyinvadingtheirpersonalspace. Overall,itisunfortunatethatzebrafinchesareinexpensivebirdsduetotheirhighlevelofbreeding.Theyrequireconsiderablecaretolivehappylives.Thebestcare-takersaretrue avianfanciers—peoplewhohaveappropriatespacef
8、orthenestsandenoughtimetoallowthemtonest-buildandbreedwithoutover-breeding. 28.Whatisthepassagemainlyabout A.Zebrafinchesover-breedbynatureanditsconsequentilleffects. B.OnlypeoplewholovebirdscantakecareofZebrafinches. C.Domesticzebrafinche
