Multiple choice questions

AQA AS Economics has 25 multiple choice questions at the start of the paper and I'm awful at them. In my mock last week I got 12/12 and 23/25 on the big actual essay questions but only 12/25 on MPQ so I only got a B overall.
My real exams start a week today, very nervous but I'll just be happy to get them over with. 8 exams in Econ, Biology, Psychology and History between the 13th May - 2nd June, I'll be a mess by the end of them!