Los amigos ____________________ a casa después de la escuela. (poder/volver)
<em>Answer : </em>Los amigos <em>vuelven</em> a casa después de la escuela.
Explanation : "volver" means to come back. The subject in this sentence is "Los amigos", that is the third plural person, so the verb must be conjugated in the third plural person too. Ellos <em>vuelven</em>.