1- escoger audio listen to each question and choose the most logical response. porque mañana es la prueba. porque no hay clase mañana.

You did not attach the audios.

Explanation:

Porque mañana es la prueba: because the test is tomorrow.

Porque no hay clase mañana: because there is not class tomorrow.

Looking at the possible answers offered by the text you have put in, I suppose the person is asked: "Why aren't you doing your homework?" (¿por qué no estás haciendo tu tarea? to be answered: "there is no class tomorrow" (porque no hay clase mañana). Or, "why are you studying today?" (¿por qué estás estudiando hoy?) and "because the test is tomorrow" (Pporque el examen es mañana).

sorry for my answer, but you haven't put the audio and I tried to give you a hand equally, good luck!