{{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.

how to ChECk thE quAlity During proDuCtion A．ChECk EvEry onE. B．tAkE sAmplEs to ChECk it. ChECk it At rAnDom.