Antes de que ellos _[blank]_ a la escuela, necesitaban comer. ¿Qué palabra completa la oración correctamente?

vayan
fueran
fueron
van

Okay so i'm taking an online spanish course (penn foster), and in the study guide, you have to create a bunch of sentences with words you've learned so far. translating, reading, and those kinds of things are fairly easy, but when it comes to making my own sentences, my brain just kinda waltz's away. anyone got any tips?

Amis padres no (gustar) las películas viejas.

What do older generations teach to new ones in paraguay