"Ihr habt Fragen?"
As M.Bonaparte says, I learned that in german, in a yes/no question, the verb comes before the subject. So "Habt ihr Fragen?". I think this is the correct form and that it sounds much better in german. As in english I think "You have questions?" (without the auxiliar verb "do" in the beginning) is not very correct. I can't figure out why this is always happening here in Duolingo!