If you had your basic concepts run through with AP Cliffs and supplementing some practice questions like Qvault or Topscore, you will be just fine. Just giving you a heads up that when you see a question, it either comes to you as 100% so clear versus 0% blank. out of 40 questions, I would say you will be able to answer or reason out the right answer around 34~36 of them. ~4 I probably would have never known even if I studied for 2 more years lol. I marked 4 questions on bio, and I got all of them wrong lol... but that's just me. I've seen people nailing 30 on BIO, so it is luck of the draw. Unless you're aiming a 30, you're on the right track. Good luck!