whAt ArE thEy tAlking ABout moAnE
A．moAnE will At lEAst stuDy thrEE morE yEArs.
B．moAnE BEgAn his ph.D. stuDiEs lEss thAn thrEE yEArs Ago.
C．moAnE hAs stuDiED At lEAst For thrEE yEArs.
D．moAnE hAs AlrEADy BEgun his ph. D．long BEFor