--Are these your books?
--______.

—Are these your brothers?       

   —            .

A.Yes,these are        B.No,these are   

C.Yes,they aren’t           D.No,they aren’t

 —Are these your brothers? —           .

A. Yes, these are                                                                B. No, these are

C. Yes, they aren’t                                                              D. No, they aren’t

          trousers            ?

A. Whose; these are   B. Whose; is this  C. Whose; is it   D. Whose; are those

---Are those cars?
--- Yes ,________.