Yo / llevar / este / reloj / la semana pasada question 2 with 1 blank¿cuándo / encontrar / (tú) / ese / corbata? question 3 with 1 blankayer / nosotros / oír / este / música / en la fiesta question 4 with 1 blankjuanjo / venderle / aquel / libros / a raquel

Here we need to form the sentences:

1) yo / llevar / este / reloj / la semana pasada  

This can be completed in the "perfect preterite" of the verb "llevar"

"Yo lleve este reloj la semana pasada"

2) ¿cuándo / encontrar / (tú) / ese / corbata?

Here again, we need to use the perfect preterite in the verb "encontrar", and change the genre of the word "ese" because the word just after, "corbata", is feminine.

"¿cuándo encontraste esa corbata?

3) / nosotros  / oír / este / música / en la fiesta  

Again, here we need to use the "perfect preterite" and correct the word "este" for the same reason as before, "musica", as most words ending with an a, are feminine words.

"Nosotros oimos esta musica en la fiesta".

4) Juanjo / venderle / aquel / libros / a Raquel

Here the verb is "venderle", and we can conjugate it in the perfect preterite, we also need to correct the word "aquel", because we are talking un plural here, so the sentence is:

"Juanjo vendio aquellos libros a Raquel"

hey, i'm sorry to disappoint you, but we can not answer your question today. we do not have your audio clip, therefore we can not listen to the audio about the schools in nicaragua. if you are able to put what the audio recording says here, i'd gladly be able to you.

have a nice day and happy halloween!