.I him to stop smoking but failed.A. persuadedB. tried to persuadeC. try persuadingD. tr

问题补充：

.I him to stop smoking, but failed.

A. persuaded

B. tried to persuade

C. try persuading

D. tried persuading

答案：

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。