{{B}}quEstions 23-30{{/B}}
·you will hEAr A ConvErsAtion ABout quAlity Control.
·For EACh quEstion (23-30), mArk onE lEttErA,B、orC、For thE CorrECt AnswEr.
·AFtEr you hAvE listEnED onCE, rEplAy thE rECorDing.

At thE gooDs stAgE, wE mAkE surE thAt A．quAntitiEs ArE CorrECt B．quAlity is ok C．A、AnDB