Does the voice pronunciation of "Usa" sound wrong to anyone? It sounds to me like "Uesea". Is that the correct pronunciation or just a mistake that needs to be reported?
It's a mistake, probably in the vocalization program. It's already been reported. You're welcome to report it again.
Unfortunately, reporting it will not do any good, since we contributors can't do anything but disable the audio-only exercises (which has already been done). It's an issue with the text-to-speech program, which is not through Duolingo: https://www.ivona.com/ We've tried reporting the problem there, with no success so far. USA (for the country) isn't even pronounced that way in Italian; it is pronounced just like the verb "usa" should be (OO-sa).
It's spelling out "usa" rather than pronouncing it as a word, probably because it has an exception for "USA" (as in United States of America).
March 24, 2016, still happening. It's happened on a number of sentences that use the verb "usa." This really needs to get fixed.
I see. So "-are" verbs take the ending "-a" in the 2nd person imperative tense? So the "Lei" (you) form would be "Usi bene il suo tempo"?