It doesn't let you omit questions, it just shows you that page again with the omited question in red type. yes, that's because if you were to omit the questions it would botch your answers. When I took one on paper it had a point scale of 1-4 for all the questions, so if there was a middle option it'd be 1-5, you could just choose the no answer(which would give you a 3 based on this scale) and it'd say you were a moderate, which isn't correct since you just didn't answer anything.