For keyholes, if you practice BC you should be fine I think. Even though I got some weird questions I was able to figure out the answer from just practicing so many keyholes on BC (I think, Idk, maybe I missed all the keyholes). But on BC I always did bad on angles and keyholes, always missing at least 4 on both. I think if you just practice those and make sure you take your time on the other parts you should be fine. Honestly, for hole punching, TFE, and cube counting you should try to avoid getting any wrong because those are easy ones to find out the actual answers to and give you some major points on the exam.