Вопрос по английскому языку:

Задание: Вставьте 's или s' там, где это необходимо.
1.This is David...dog.
2.My cousin... birthday is in May. I'll give him a dog as a present.
3.This is David... and Frank... dog.
4. She has got two brothers. Her brother.... room is on the right.
5. She has got a brother and a sister. Her brother... teacher is from London.
6. What is your sister... name?
7. The Brown...pet is very nice.
8. These are my friends. The boy.... grandmother works in a hospital.
9. I have got an aunt and an uncle. My aunt.... friend works in London.
10.I like Kate... and Bob... grandmother.

11. This hamster is Billy... pet.
12. This tortoise is Billy... and Bob... pet.
13. I have got a grandmother and a grandfather. My grandparent... car is not new.
14. Mrs Black... dog is the cleverest animal know.
15. The Black... dog doesn't eat bread.
16. Mr Smith... family is not large.
17. Tom... brother is a businessman.
18. I have got two friends. My friend... grandparents don't work.
19. I have got two sisters. There is a nice picture in my sister... room.
20. Mrs Porter... house is very nice.