单选题
编号：2578998
1.Whyisn′ttheword\"sir\"commonlyusedinBritain?
- A.Becauseitsoundstooservileandislikelytocauseembarrassment.
- B.Becauseitcanonlybeusedinsomecertainoccupations.
- C.Becauseitisanimpoliteword.
- D.Becauseitshowsthatthespeakerisnotwell-bredperson.