——Whose book is this?

——It isn’t mine．It’s          ．I think．

A．her                      B．your                    C．his                         D．their

---Whose book is this? There is no name on it.
---Let me see. Oh, it’s          . I lost it a few days ago. 

---Whose book is this? There is no name on it.

---Let me see. Oh, it’s          . I lost it a few days ago. 

A．his               B．hers              C．yours             D．mine

---Whose book is this? There is no name on it.
---Let me see. Oh, it’s          . I lost it a few days ago. 

1. A.
   his
2. B.
   hers
3. C.
   yours
4. D.
   mine