How should one know whether to use "het" or "de" here? Since "wijn" is not clearly masculine or feminine and I don't remember having learned the article along with the noun, it seems like a coin toss.
Mostly you have to memorize them. This link can help, though: https://www.duolingo.com/comment/3732938
So in this question ei has 'de', but a few questions before it was 'het'?? So how come?
'Het' has two meanings:
1) it (e.g. Het is wijn "It is wine")
2) the (with neuter nouns, e.g. het water "the water")
Could this be the explanation?