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listEn to A pArt oF A lECturE in A BusinEss ClAss.

why DoEs thE proFEssor sAy this
.A．to ExprEss unCErtAinty ABout thE stAtEmEnt.
B．to CritiCizE somE CulturEs.
C．to ArousE stuDEnts’ AttEntion.
D．to ChECk thE stuDEnts unDErstAnDing.