<p>From what I’ve heard from my French teacher, you don’t even need to get to the end to get a good grade. You could easily start describing one picture and then veer off to a side-story you made up. She knows this because she went to an AP conference and there they said that just as long students speak the best French they can, the whole story doesn’t matter.</p>
<p>Now what would be really bad, would be just not saying anything at all for half of the time. But just as long as you spoke for the full time then your grade isn’t going to be as bad as you think it is :)</p>