4. My best friend (arrive) _______ at my house a little before 9:00 pm, but I (be, not) _______ there. I (study) _______ at the library for my final examination in Italian.

My best friend arrived at my house a little before 9:00 pm, but I wasn't there. I was studying at the library for my final examination in Italian. *Объяснение:* *Arrived* - Past Simple (завершенное действие) *Wasn't* - Past Simple (отрицание) *Was studying* - Past Continuous (действие, происходившее в определенный момент в прошлом)