Choose the best answer

12. Whose bag is this? - It's ...
A.           I
B.           mine
C.           my
D.           me
13. Whose jeans are these? - They're ...
A.           his
B.           he
C.           him
14. Our car is bigger than ...
A.           they
B.           theirs
C.           them
D.           their
15. Whose dictionary is this? - It's ...
A.           Mary's
B.           her
C.           She
16. I need help. Please, help______ .
A.           I
B.           My
C.           mine
D.           me
17. We gave them ________ telephone number, and they gave us ________.
A.           ours, their
B.           our, their
C.           ours, theirs
D.           our, theirs