.I him to stop smoking, but failed.
A. persuaded
B. tried to persuade
C. try persuading
D. tried persuading
网友回答
A. persuaded
(答案→)B. tried to persuade
C. try persuading
D. tried persuading
解析：考查短语：try to persuade sb to do 试着说服某人做某事，句意：我试着说服他戒烟，但是失败了。所以选B。