'We have no paper' is wrong?
Seems fine to me.
Why is "we do not have a paper" wrong?
Because paper is uncountable. 'a paper' implies a newspaper, or perhaps some document, but that would be rather colloquial.
Too bad I don't speak english perfectly, but there is no option to learn polish from czech language in duolingo :( i am basically learning two languages at once :D
It may be hard sometimes, but actually it's helpful in a way ;)
Same, i'm Russian but learning Polish from English too:)
Why is ‘we don’t have paper ‘not acceptable ?