Answer:
1.) Marco, adonde vas tu despues de las clases
2.) Voy a mi casa. Luego, mis amigos y yo vamos a estudiar en la biblioteca.
3.) Hay examenes manana? Yo no voy a la biblioteca pero tengo que estudiar.
4.) Van (or vais if you guys are using that) Ana y tu a comer en un restaurante?
5.) Si, nosotros vamos.
The answer is estudiamos.
Remember that the subject is nosotros (we) and we would have to match the subject and the verb by conjugating the verb. A nosotros conjugation is always 'amos' in an ar verb.
B.queria
Hopefully this helps you!
I can't hear what the audio. You can fill those blanks with any word in my language actually so, If I can't hear the audio, I cannot give you a certain answer. Sorry.