·you will hEAr A prEsEntAtion ABout CountErtrADE.
·mArk onE lEttErA,B、orC、For thE CorrECt AnswEr.
·you will hEAr thE rECorDing twiCE.

switCh-trADing ADDs FlExiBility to ClEAring ACCount BECAusEA、CrEDits in thE ACCount ArE trAnsFErABlE.B、DEBits in thE ACCount ArE trAnsFErABlE.C、DEBits AnD CrEDits in thE ACCount ArE AlwAys kEpt BAlAnCED、