What is the correct French word that fits the definition?

I use this to see better.

4. when one of two events in the past interrupts the other one, a.) the action that does the interrupting should be in which tense? b.) and the action that is being interrupted should be in which tense? 5. what tense should you use in french for the english (he / she) used to (+ infinitive)?

Ma ajutati va rog frumos reponds: "pourquoi la police est-elle descendue au louvre" "quelle est la valeur du portrait de jean le bon" "le voleur a fourni de fausses pistes aux gardiens.trouve les phrases qui expriment cette idee" "qu'est-ce qui a facilite le vol de la toile de watteau'' ''que represente i'indifferent'' ''comment s'explique le nom du tableau'' !

From where are you returning if you say j'arrive du québec?