选词填空。
hers his    theirs   
1.The books are Kitty and Ben's. They are ________.   
2.The volleyball is Alice's. It is________.   
3.The pen is Mike's. It is ________.

改错题。
1. They will read books in Sunday.
___________改为____________
2. We will have lessons and our friends together.
___________改为____________
3. We hope ours school will be better.
___________改为____________

Classify the words. （把下列代词分类）
I, you, my, he, she, him, them, mine, their, his, myself, your, yours, hers, it, yourself, our, themselves, ours, me
1. 形容词性物主代词：________________________________________
2. 名词性物主代词：__________________________________________
3. 人称代词主格：____________________________________________
4. 人称代词宾格：____________________________________________

My legs are longer than ________. (　　)

A．you

B．your

C．yours

It isn't ______, Tom. It's ______.（   ）

A．you, mine

B．yours, my

C．yours, mine