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!
Ud=Usted ( Singular)
1: Canta
2: Escribe
3: Mira
4: Come
5: Respira
6: Nada
Uds= Ustedes (plural)
7: Viajan
8: Empiezan
9: Escriben
10: Relatan
11: Usan
12: Beben
13: Hablan
14: Suben
15: Ven
Hope this helps, good luck!
I think it might be “dejar” but i’m not too sure because there’s no context.