OK,
I think I've managed it. But I do need your help in testing it on my Moodle test site. Login as teacher1, password Teacher1!, go to the Questionnaire Module Demo course. Test the "Latin" questionnaire, which contains just one question.
You are welcome to add more questions to that questionnaire or create your own, etc.
If tests go well, I will commit the modification to CVS (if my co-maintainer Mike agrees). For anyone willing to modify their own Questionnaire files, I will post the simple patch in the Bug tracker soon.
Joseph