Ladies and gentlemen I have the great privilegeintroducing our speaker for tonight . A

问题补充：

Ladies and gentlemen , I have the great privilegeintroducing our speaker for tonight .

A．in

B．of

C．about

D．on

答案：

解析：介词吧辨析。In在……里面；of……的；about关于：on在……上面。句意：女士们先生们，今天我有这个巨大的荣幸来介绍我们今晚的演说者。have the great privilege of有……的荣幸，故选B。