A: Whose is this watch?

B: Is it a black_____________ ?　　　

[　　]

A. this watch　　   　B.one

C. the watch　　　    D. the one 

This is not my watch. Do you know ________ it is?

1. A.
   what
2. B.
   which
3. C.
   who
4. D.
   whose

This is not my watch. Do you know ________ it is?

A. what

B. which

C. who

D. whose