选择.Aunt Lucy sent(a child's/a children's)book to me.请说明理由。

问题描述:

选择.Aunt Lucy sent(a child's/a children's)book to me.
请说明理由。

a child's
child 是单数 children是复数,前面不可以用a

children's 理由:个人认为本题想表述的意思是“孩子们看的书”,children‘s 作定语.至于外国人有没有特定的习俗就不清楚啦.