{{B}}quEstions 13 to 15 ArE BAsED on thE ConvErsAtion you hAvE just hEArD、{{/B}}

A．BECAusE proFEssor rivErs is intErEstED in womEn’s stuDiEs.
BECAusE proFEssor rivErs is FonD oF proFEssorAnDErson.
C．BECAusE proFEssor rivErs knows littlE in this ArEA、
D．BECAusE proFEssor rivErs hAs A lot oF spArE timE.