Eugene's never willing to alter any of his opinions. It's no use             with him.     [ ]

A. to argue            

B. arguing

C. argued            

D. having argued

外科疮疡在化脓阶段，其舌苔多为（）

A.白苔

B.黄苔

C.腻苔

D.黑苔

E.白腻苔