Ответ:

1. i was happy to see you.

2. it was my favourite book.

3. mary wasn't at school.

4. it was a very interesting film.

5. we were good sportsmen.

6. tom was my best friend.

7. nora was on holidays in italy.

8. the dogs were under the table.

9. my mobile was broken.

10. they were good students.

11. this dog was very friendly.

12. i was at the shopping centre.