1) (a)   yours?

2) No, it isn't (a)   .

3) I think it's (a)   .

4) Are these combs (a)   ?

5) No, (a)   mine.

6) I think (a)   .

7) (a)   diamond ring is this?

8) I think (a)   .

9) (a)   this?

10) (a)   . Thank you!

11) This (a)   is for you!

(WB homework accepts other reasonable items.)