【单选题】
·you will hEAr A DiAloguE Among Four spEAkErs.thEy ArE tAlking ABout mEgADromE pArk proBlEm.
·For EACh quEstion(23-30),mArk onE iEttErA,B、orC、For thE CorrECt AnswEr.
·AFtEr you hAvE listEnED onCE,rEplAy thE rECorDing.
in thE pAst months。thE mEgADromE pArk hAs lost nEArlyA.
B.
C.