----Is that your eraser ?  ---_________.

A. Yes, I am             B. Yes, he is             C. No, it isn’t              D. No, I’m not

---Is that your eraser ?

---______.

1. A.
   Yes, I am
2. B.
   Yes, he is
3. C.
   No, it isn’t
4. D.
   No, I’m not

—Is that your eraser?　　　

—No, ______ is red. It must be ________.

A. my , somebody else　　　　　　 B. mine , somebody else’s

C. mine , someone else　　　　　　 D. my , someone else’s