请告诉我几个单词的复数形式
sheep
woman
child
knife
class
box
参考答案:sheep______sheep
woman______women
child______children
knife______knives
class______classes
box_______boxes
sheep
woman
child
knife
class
box
参考答案:sheep______sheep
woman______women
child______children
knife______knives
class______classes
box_______boxes