Как ответить на вопрос whose are these books

Аможно they are mine смотря что проходите в школе

These are my  books

Past simple и present perfect 1. i saw you yesterday. 2. i have read this book. 3. i understood the text. 4. i met him yesterday. 5. he has already found the book. 6-7. he said, he knew her adress. 8. i told her this story. 9. our team didn`t win the championship last year. 10. i have already done the exercise. 11. he wrote a book last year. 12. he taught me a good lesson. 13. sorry, i forgot your address. 14-15. i took my umbrella and went out. 15. i left my umbrella at home. 16. made in china)) 17. i have cut my hair off. 18. i won the prize last time. 19. i lost my bag yesterday. 20. he has paid the price. 21. he came late last evening. 22. she gave me a good advice. 23. i`ve already heard the story. 24. you could learn it by heart, but you didn`t. shame on you! 25. i thought he was my friend. 26-27. everyone became quiet and sat down in their seats as the show started. 28. the lesson has already begun. 29. he drove his car too fast last time. 30. i spoke to me friend yesterday.'! !