quEstions 14-17 ArE BAsED on thE Following DiAloguE BEtwEEn ClAssmAtEs ABout thEir prEsEntAtion. you now hAvE 20 sEConDs to rEAD quEstions 14-17. whAt ArE thE stuDEnts Doing whEn thE mAn ArrivEs in thE ClAssA．hAving A ClAss DisCussion.
B．giving prEsEntAtions.
C．DrAwing grAphs.
D、tAking An ExAm.