That's nice to know. Apparently I have 'upper intermediate' (or, begrudgingly, above) English language ability.
Thank you British Council for your insight.
Some of your questions were dodgy as ---- (choose the most appropriate word).
Ah, sod it. I'm not accepting this...
So, I just went back through and entered the exact same answers and got 100%.
It all boils down to how confident you are about your answers. After each selection it asks you this:
And I wasn't certain about some of them, because some of them had more than one acceptable answer.
Mind you is the obvious choice there, but, colloquially speaking, still would also be passable. However, when I tried that, I got knocked down to 96%. Although I chose mind you during the first round, I said I was uncertain and lost the points.
So, I was marked down for being a conscientious student. I'm not entirely sure that's fair.