Why cant it be "мій офис - у атланта" ? We, ukrainian, say so.
Офис is Russian. Атланта should be in locative (в Атланті). Duolingo doesn't check punctuation, but you don't need a dash
Why cant it be " мій офис - атланта .... ?
Do you have to use 'в' here? Because I used 'у' and it was marked wrong
Both are accepted (at least now)