How the word "chi" is translated into English
Chi è quella ragazza?
Who is that girl?
Con chi vai in vacanza?
Who are you going on holiday with?
Non so chi ha telefonato.
I don't know who called.
"chi" is in the lesson "Pronouns" (Level 30), along with 17 other useful words. LinDuo has 180 topic lessons like this one, 2,375 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.