boy girl child children哪个不同类型

boy girl child children哪个不同类型 children camera child 哪个读音不同 man ,woman ,child ,a boy and a girl的复数 38.She has two children,___ boy and ___ girl. many child；many children；many sheeps哪个正确,说明理由 whose/who/which/what child is that girl?选哪个 ( )child is that girl? Once there was a man who had two children,a boy and girl.The Once there was a man who had two children,a boy and a girl. Once there was a man who had two children,a boy and a girl.T I have two children ,one is a boy,( )is a girl.December is ( some child ,child 为什么不是children