cramming Biology

Hi, I’m a Year 13 student and my mocks are on December 9th, where we’ll be doing Paper 1. I got a C in my AS exams, and this year, I’ve been getting Es and Us in all my mini-tests. The teacher explains things really quickly, and all the other students seem to understand everything, but me because I’ve also been sick for a while, which hasn’t helped. Now, I’m trying to cram everything in, but I know I won’t get an A*, I’d be happy with a B for the mocks. Long-term, I’m aiming for an A in the actual A-Level exam. Given that I’m behind on content, do you think just doing and marking past papers would be enough, or should I try something else? What advice would you give me?