policeman复数,policeman

二,写出下列名词的复数形式.
tooth _ 25.man _ 26.woman _ 27.fireman_ 28.policeman _ 29.
foot 24.tooth 25.man 26.woma 27.fireman_ 28.policeman 29.
如: foot→feet;tooth→teeth; man→men; woman→women; policeman
irregular plural nouns 非规则复数名词