Mientras él (hacer) la tarea, su amigo (llegar) a la casa

For jai alai, can someone give an explanation of the league or organization that manages the competitions and an examination of the fan base of the sport.

Antes de ir a la escuela la cara, pero

Does anyone know what my spanish teacher means by this? i need to use plural forms of the verb ser. and she asked me to use a couple of adjectives to describe the boys collectively and then the girls collectively?