The sentence would be written:
¿Usted pagó en efectivo o tarjeta de crédito?
But you could also say:
¿A pagado usted en efectivo o con tarjeta de crédito?
Answer:
Question 10: When I want to study, I listen to music.
Question 11: His cousins can't.
Question 12: He/she needs to study Spanish every day.
Questions 13, 14, 15: I don't have the audio
Hope this helped!
