I have the same problem. I'd like to achieve something this year but after having looked thru these sheets with tasks I'd be supposed to deal with I claimed that it's just impossible for me. :P It's necessary to know a lot of sophisticated wordz, know plenty details concerning the grammatical rulz etc.
I could just say: It's demanded to speak English very well. If u don't, u won't win a lot.
I personally will try to solve these tasks, but in my case it's rather obvious that I won't manage it. ;P
To the question you put...
You've got to refresh all the English grammar you've learnt so far and learn more wordz, as without knowing vocabulary you'll drop out at the beginning of this contest.
That's all.