Общ. 1. Do his sisters work at a new factory?
Спец. 2. What do his sisters do at a new factory?
3. Where do his sisters work?
4. What factory do his sisters work?
5. Who works at a new factory? (Вопрос к подлежащему)
6. Whose sisters do work at a new factory?
Альтер. 7. Do his or her sisters work at a new factory?
8. Do his sisters or brothers work at a new factory?
9. Do his sisters work or walk at a new factory?
10. Do his sisters work at a new or an old factory?
11. Do his sisters work at a new factory or farm?