What does josefina and manuel do?
vamos,vamonos
-vamos a ir ala escuela
-Vamonos para la casa
This sentence is grammatically INCORRECT.
It's supposed to be Gerardo te <span>compra la cena.</span>
There are many cities in the U.S. that have Spanish names like San Jose, San Antonio, El Paso, etc. Hope this helps!
Es su camiseta.
Su is used to show possession of singular objects, in this case, a t shirt, in third person form.