Convertir en voz pasiva1?

Convertir en voz pasiva 1. - The teacher asked the students a very difficult question at the oral exam 2. - first, we have to read the text and then, we have to do the exercises 3. - his parents promised tom a hundred euros if he passed the test 4. - did they repair all the windows 6. - is the teacher correcting the exams right now ? 8. - where did they find the book ? 9, - the taxi driver drove us to the airport 10. - many people have seen a UEO in this area PLOX, gracias : ).