Questions & Answers about Gosti dolaze jedan po jedan.
Because gosti is the nominative plural form, and the nominative is used for the subject of the sentence.
Here, gosti are the ones doing the action of arriving, so nominative is required.
- gost = guest
- gosti = guests
By contrast, goste is usually the accusative plural, which you would use when guests are the object of a verb, for example:
- Vidim goste. = I see the guests.
So in Gosti dolaze..., gosti is correct because the guests are the subject.