Todos los días mis amigos y yo vamos _____ parque.
Answer : Todos los días mis amigos y yo vamos al parque.
Explanation : "parque" is a singular masculine noun, so its definite article must agree. "El parque". "Al" is the contraction of the preposition "a" and the definite article "el". "Al" means "to the".
Translation : Everyday my friends an I go to the park.