Respuesta :
1. "Nos gustan" 2. "Me gusta" 3. "Les gustara" that's all I can do the rest I don't understand it.
Answer:
Nos gustan los perros porque son amigables (this is first person plural which is used because "los perros" is plural)
Me gusta mucho visitar museos de arte contemporáneo (Actually here "te gustaría could be also correct, as in a recommendation for someone who you think would enjoy museums. However, the most common use would be to stick to first person singular)
A los jugadores les gustaría ganar todos los partidos (because jugadores is the noun and it's plural, we must use the plural form in "les")
Me gustaría ir a la ópera algún día (all the other forms don't match in number)
No nos gustaría llegar tarde al concierto (same here, nos gustan and te gustarían don't match in number and person)