boy's leg
girl's key
cat's tail
father's friend
boy's toys
这个题目没有s'的项目
应该是:
the boy's leg
the girl's key
the cat's tail
the father's friend
the boy's toys
1.the leg of the boy ___the boy's leg
2.the key of the girl___the girl's key
3.the tail of the cat___the cat's tail
4.the friend of my father____my father's friend
5.the toys of the boy ______the boy's toys