ответьте на вопросы( заранее) 17. is boris petrov putting his exercise-book on the table? 18. who's your friend? 19. who's this man? 20. are these men factory workers or engineers? 21. who's this girl? 22. where are our books? 23. whose books are these? 24. whose exercise-books are these? 25. what kind of room's this? 26. what kind of pencil's this? 27.what kind of pen's that?
