Since then the number of people who were addicted to smoking ________ 20%. [ ]

A.  has reduced to  

B.  reduces by

C.  has reduced by  

D.  have reduced by

医患关系要做到真诚相处，最主要的是（）

A.关系和谐

B.尽职尽责

C.平等相待

D.互相尊重

E.互相信任