Jack was in low spirits those days and his friends did all they could _____ him up.

A．cheer

B．cheering

C．cheered

D．to cheer

通过创设良好的情境对学生进行潜移默化的影响，以培养学生品德的方法是( )

A．说服法

B．榜样法

C．陶冶法

D．锻炼法