"How did you know?"
Traduzione:Come hai saputo?
Hi marcherione your answer would be correct if the sentence had been in english as " How did you now IT ? ". The difference is in the use of pronoum it that is in italian LO from you trannslated NON LO CONOSCEVI? Thanks a lot for your observation useful for me and to give an explanation that i hope exhaustive. Hallo and see you soon