Estudiar because it means to study
Any adjective that ends in an -a would be correct because the adjective needs to be feminine like baja(short), bonita(pretty), alta(tall), ect....
The picture you’ve put up is blank, I can’t see nor will it let me view!
ANSWER:
· La semana pasada, mis amigos y yo <u>andábamos</u> por el parque.
HOPE THIS HELPS...!!
