"I do not like the city in which he lives."
Translation:Non mi piace la città in cui vive.
thanks for your information ! i didn´t know that there must be a different translation of "which" whether it´s a interrogative or a relative pronoun (where i have to add the definite article). so, as far as i understand, there are two correct translations possible: "...in cui vive" or "...nella quale vive". i´ve learned a lot!