My hair is shorter than ___________.

--Is your iPad black, Mary?--No, it isn’t. ______________ is white.

 --- Are these your books?      　　　　　　--- No, they aren’t. They are ____________.

---Is this _____ schoolbag?---No, it isn’t. _____ is black. But this one is white.

—Who helped you repair your bike?—________ ! I repaired it all by myself.