—Sorry I can' t work out this  problem.

—Try again, please. It's only _____ difficult.   [ ]

A. a bit of                    

B. a lot  

C. a little                    

D. much too

党的十八大以来，党中央以（）为切入点从严管党治党。

A.思想建设

B.理论建设

C.作风建设

D.队伍建设