thE ConvErsAtion hAD BEEn (CArriED on) ChiEFly (in FrEnCh), A lAnguAgE (whiCh) mr. stEwArD wAs (pErFECtly) ACquAintED.
A．CArriED on
B．in FrEnCh
C．whiCh
D．pErFECtly