Respuesta :

ering475
First one is unos because it’s male and plural.
Second is una I think. If you can use things multiple times might want to check again.
Amigas is unas since it’s plural and female
The last one is uno since it’s male and singular
alizonvillicana211
Unos - alumnos
Una - clase
Unas - amigas
Un - amigo