I have the following sentence :
Los invitados (llamar) ______ a la puerta y les (abrir) _____ una joven (ser) _____ una muchacha.
I think that it should be the following :
Los invitados (llamar) llamaban a la puerta y les (abrir) abrio una joven (ser) era una muchacha.
Yet, I'm not sure since (abrir) aka opening the door, is an action that terminated in the past she open the door the action was finished when the door was open if I use abria doesn't it mean that the action is still taking place? like she is just opening the door? I'm a bit confused.