threshold [ˈθreʃhəʊld] noun 1. [doorway] umbral m 2. [level] límite m the pain threshold el umbral del dolor 3. (fig) [verge] to be on the threshold of estar en los umbrales or a las puertas de
Complétez la séquence avec la proposition qui convient. I … done my homework yet when they showed up. had hadn't