Seems like kinder garden homework lololo.
Use the verb decir and oir? "Tu dices que oyes gritos" that's present so I guess all of them have to be in present too?
Sarita dice que oye disparos.
Carlos y yo decimos que oimos pasos.
Los hermanos dicen que oyen voces.
Yo digo que oigo suspiros.
Tu dices que oyes musica.
Elena y Clara dicen que oyen una sirena.
By the way, I didn't put any á, é, í, ó, ú, might want to check for those.