"Good morning, students!"
Translation:Добрий ранок, студенти!
I just had the same thing happen to me, and chose that answer for the same reasons you did! (It was also the only pluralized word to select.) I think out of fairness this course should have introduced the word, or else change this exercise (in the practice mode) to be студенти.
What's more, is that учні is not even in my Words section on Duome.
Has this course taken material away since it started? I have noticed that some words in practices throw in a different word from the course that might have been left over from a past skill or lesson that is no longer there.
I created a topic about how different users have different amounts of words completed on their Duome profiles, and now I'm starting to wonder if some of these mysterious words are popping up because of lost material that has been omitted.
I come from Russian and have just recently moved into Ukrainian as well. The way I think of it is that Russian и is Ukrainian і, but that Ukrainian и is a rough equivalent to Russian ы. Belarusian on the other hand uses і and ы and has no и. Russian Cyrillic used to have an і before the 1918 orthography reform completely eliminated it and the arcane rules governing its use (і was only used before vowels and й, but it turned into и if it was the last letter of a component of a compound word. и was used before all consonants and at the end of words, with the huge exception of міръ (you also had to put the hard sign at the end of every word that ended in a consonant) "world/community/society", which was then spelled differently from миръ "peace".)