Nos is the correct answer.
Mi abuelo (nos/a mi) nos quiere comprar los zapatos para nuestra clase de baile.
Translation by Mimiwhatsup using Nos: My grandpa wants to buy our shoes for our dance class.
Translation by Mimiwhatsup using a mi: My grandpa wants to buy the shoes for our dance class.
1. Are “el” and “la” , as in “el” libro and “la” carpeta.
2. Most nouns ending with “o” are masculine and most nouns ending with “a” are feminine.
ok
