Verbal | Re: Know all grammar rules but still struggle with SC

Hi guys,
I desperately need your advice. My Gmat is coming up in 3 weeks but I still struggle a lot with Sc, spending around 2-2.5’ on each Sc question and still got around 40% of them
incorrect. While I definitely see some improvements in RC and CR, Im so lost with SC !
I cant figure out what I’ve gone wrong. I read Manhattan SC guide twice, completed egmat course, finished all the OG questions and reviewed them carefully. I also bought extra question pack from Official Gmat to practice