Answer:
Roberto y Pablo tienen que trabajar
Explanation:
Luis Walter Alvarez was a noble prize winning physicist, who is probably most famous for the discovery of the iridium layer and his theory that the mass extinction of dinosaurs was caused by an asteroid or comet colliding with earth. <span />
Yo - oigo
Tú - oyes
él/ella/usted - oye
Nosotros - oímos
ellos/ellas/ustedes - oyen
