I never have. In term exams and trials. Neverr.
Though, I think, if the question states,
"Select a certain heading and use this as a stimulus:
Journey through Time
Journey of the Heart
etcetc"
then it's pretty obvious.
And also, I only have one story, have only ever had one.
Always changed it to fit the question. In term exam (based on 2007 HSC) and in Catholic and Independent trial, always got 15/15.
I don't have a back up story, and don't plan to either.
It's a pretty long story, as in, the story itself lasts over a few years, and its highly metaphorical, with respects to a garden and its contents. So, I can generally adapt it to most things.
Thanks for the tips though. Might help the people who are starting their story NOW.