Answer:Los niños son alto.
Explanation: The subject and verb are in plural but the adjective isn't and it should be.
Answer:
En la escuela secundaria, nosotros (comiamos ) a las doce, y después de la escuela íbamos a comer pizza.
Explanation:
It would be;
Antes mi hermanita le TENIA miedo a los perros.
TENIA is the past form.
Hope this helps (not sure if this is what you needed)