【单选题】
·you will hEAr pArt oF A ConvErsAtion BEtwEEn two mAnAgErs From DiFFErEnt CompAniEs, A womAn CAllEDElizABEth AnD A mAn CAllED stEvEn.
·For EACh sEntEnCE 23- 30,mArk onE lEttErA,B、orC、For thE CorrECt AnswEr.
·AFtEr you hAvE listEnED onCE, rEplAy thE rECorDing.
stEvEn AgrEEs thAt this CompAny willA、instAll thE systEm AnD pAy pArt oF thE sErviCing Costs.B、pAy thE Costs oF sErviCing For thE First yEAr.C、instAll AnD sErviCE thE systEm.