从下面的方框内选出恰当的句子完成对话

A. This book might be Mary's. B. It can't be hers. C. Whose soccer is this? D. She's the only little kid at the picnic. E. The magazine must belong to Anna.

A:

B: It must be Bob's. He loves soccer.

A: How about this magazine?

B: She loves reading and collecting magazines very much.

A: And this book?

B: Mark Twain is her favorite author.　

 A: OK. . . Here is a hair band. Is it Mary's?

B: No. Her hair is too short. It could be Alice's.  Alice has long hair.

A: Er... Look! That toy panda must belong to Mary's little sister.