(tu) eres un buen amigo (tu is an understood pronoun in this sentence.)
(somos) de miami
(yo) soy jugadoea de béisbol (understood pronoun once again)
(ustedes/ellos) son estudiantes nuevas (understood pronoun)
(tu) eres una aficionada (understood pronoun)
(el) no es mi maestro (understood pronoun)
i think this is it, lol