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 ________.

My legs are longer than ________. (　　)

A．you

B．your

C．yours

填空题。
【小题1】The bag __________ (have) got four wheels.
【小题2】There are two pens on the desk. The blue one is ________ (my).
【小题3】That yellow picture is ________ (you).
【小题4】Tom is __________ (twentieth) years old.
【小题5】My cousin __________ (speak) English every day.

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

A．you, mine

B．yours, my

C．yours, mine

It's ________ book. The book is ________. (  )

A．your; your

B．your; yours

C．yours; yours