unseen
[ˌʌnˈsi:n]adjective
[not observed] inosservato ( f inosservata)
[not visible] invisibile
unseen
[ˌʌnˈsi:n]adverb
senza essere visto ( f vista)
Complétez la séquence avec la proposition qui convient.
They say that … jogging every day is good for you.