"El mes pasado encontramos boletos muy baratos."
Translation:Last month we found very cheap tickets.
my answer "Last month we found some tickets very cheap." was not accepted. I think last time my answer did not have the word Some in it and that was not accepted so I added it. Now it is not accepted! :(
Hmm not a native in English but I'm pretty sure it's not quite natural to say "THE last month".