Answer :
Registraba and descansaba are imperfect. They should be preterite instead because it happened last night—anoche—at a specific time.
Corrected sentence: Anoche, me registré en un hotel y descansé por la noche.
Registraba and descansaba are imperfect. They should be preterite instead because it happened last night—anoche—at a specific time.
Corrected sentence: Anoche, me registré en un hotel y descansé por la noche.