помогите решить задание
7. Robert looked round. A man was standing in front of

a) him

b) his

d) himself

c) he

8. Suddenly in front of ... she saw a dog.

a) hers

b) she

c) her

d) herself

9. I have no pen, give me ....

a) your

b) you pen

c) the pen of you

d) yours

10. My flat is large, ... is small.

a) her

c) she

b) hers

d) to her

11. Whose window is that? It's....

a) ours window

b) our's window

c) the our

d) ours

12. Whose notebooks are those? They are ....

a) yours notebooks

b) you notebooks

(c) yours

d) the your

13. Your father is at the office, ... is at home.

a) mine father

b) mine

c) of my

d) my​