Choose the correct time, imperfetto, passato remoto or passato prossimo supposed that the passato remoto can't be substituted by the passato prossimo. (Once again: The supposed tense system is the system we find in classical Italian. Sometimes you can see that this system is more powerfull, more concise, than the one actually used in nowadays Italian. Concerning learning Italian it is not crucial to understand it, because Italians themselves doesn't distinguish anymore between passato remoto and passato prossimo. But if in the future you want to learn Spanish, it is very useful to understand that system because in Spanish it is a crucial error to confuse the passato prossimo with the passato remoto.)