This reinforcement section is very frustrating. İ am supposed to be reviewing the past tense, but İ keep getting them wrong because of word order. There is a brief discussion of word order in the notes, but nothing about which comes first, adverb, time, locatıon?

I don't know why is okuldan and not okul.

okuldan bu saatte neden ayrıldın? what is wrong with this answer?