周小燕的阅读理解.doc

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1、AHaveyoueverwonderedwhybirdssing?Maybeyouthoughtthattheywerejusthappy.Afterall,youprobablysingorwhistlewhenyouarehappy.      Somescientistsbelievethatbirdsdosingsomeofthetimejustbecausetheyarehappy.However,theysingmostofthetimeforaverydifferentreason.Theirsingingisactuallyawarningtootherbird

2、stostayoutoftheirterritory.      Doyouknowwhata“territory”is?Aterritoryisanareathatananimal,usuallythemale,claimsasitsown.Onlyheandhisfamilyarewelcomethere.Nootherfamiliesofthesamespeciesarewelcome.Youryardandhouseareyourterritorywhereonlyyourfamilyandfriendsarewelcome.Ifastrangershouldenter

3、yourterritoryandthreatenyou,youmightshout.Probablythiswouldbeenoughtofrightenhimaway.      Ifso,youhaveactuallyscaredthestrangerawaywithouthavingtofighthim.Abirddoesthesamething.Butheexpectsanoutsideralmostanytime,especiallyatnestingseason.Soheisscreamingallthetime,whetherhecanseeanoutsidero

4、rnot.Thisscreamingiswhatwecallabird’ssong,anditisusuallyenoughtokeepanoutsideraway.      Birdssingloudestinthespringwhentheyaretryingtoattractamateandwarnothersnottoentertheterritoryoftheirs.      Youcanseethatbirdshavealanguagealltheirown.Mostofithastodowithattractingmatesandsettingupterrit

5、ories.1．Somescientistsbelievethatmostofthetimebirds’singingisactually      .      A．anexpressionofhappiness                  B．awayofwarning      C．anexpressionofanger                        D．awayofgreeting2．Whatisabird’s“territory”?      A．Aplacewherefamiliesofotherspeciesarenotaccepted.  

6、    B．Aplacewhereabirdmayshoutatthetopofitsvoice.      C．Anareaforwhichbirdsfightagainsteachother.      D．Anareawhichabirdconsiderstobeitsown.3．Whydobirdskeeponsingingatnestingseason?      A．Becausetheywanttoinvitemorefriends.      B．Becausetheirsinginghelpsfrightenoutsidersaway.      C．Beca

7、usetheywanttofindoutsidersaround.      D．Becausetheirsinginghelpsgetridoftheirfears.4．Howdoesthewriterexplainbirds’singing?      A．Bycomparingbirdswithhumanbeings.B．Byreportingexperimentresults.      C．Bydescribingbirds’dailylife.D．Bytellingabird’s