________to work overtime that evening, I missed a wonderful film.

A．Having been asked

B．To ask

C．Having asked

D．To be asked

主治大头瘟的代表方剂是（）

A.仙方活命饮

B.五味消毒饮

C.普济消毒饮

D.黄连解毒汤

E.凉膈散