{{i}}quEstions 18～21 ArE BAsED on thE Following DiAloguE BEtwEEn A tEAChEr AnD A stuDEnt.{{/i}}

who is thE mAn in this ConvErsAtionA．DEAn oF stuDEnts.
B．lECturEr in spEEChCommuniCAtion.
C．proFEssor oFBusinEssADministrAtion.
D．ChAirmAn oF thE journAlismDEpArtmEnt.