have mercy on的用法和样例：
- They never appealed to us for mercy.
- The old lady often takes pity on small animals.
have mercy on的相关资料：
have got have have someone's guts for garters Have you hurt her feelings? have the car serviced regularly Have you seen Tom recently? have difficulty in doing sth. have neither learning nor skill Have you been there lately? Have above ground storage tanks Have you found your ticket? Have you seen their poster?