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!
The answer is "estan" las sillas en la mesa
The correct answer is the third one. "HAY muchos problemas en el mundo."