Respuesta:
4. wasn't
5. wasn't
6. weren't
7. wasn't
8. wasn't
9. wasn't
10. weren't
11. wasn't
12 wasn't
Explicación:
se usa was/wasn't cuando nos referimos a nosotros ( i) y a la tercera persona del singular (he , she, it)
y usamos were/weren't para las demás personas (they, we ,you).
