--Is this a backpack? 

--________．

1. A.
   Yes，it is．
2. B.
   Yes，it’s a case．
3. C.
   No，it is．
4. D.
   No，it’s a backpack．

--Is this a ring?

---__________

A．Yes，this is         B．Yes，it is         C．Yes, it’s        D．No, it is

—Is this ________ ruler?　—Yes，it’s her ruler．

A．your          B．your sister’s   C．your brother’s

—Is this          book?　—Yes，it’s          English book．

A．a；a          B．a；an          C．art；an

--Is this your pen?  --________．

    A．Yes，it’s a pen．                       B．No．it’s my pen．

    C．No，it’s her pen．                      D．Yes，it’s her pen．