Sentence Correction

I have gotten to the point with SC that I can always, always narrow the correct answer down to 2 options, but sometimes fail to execute.

i'm not sure the reason for this; i manage to eliminate 3 options with out fail, but the final elimination is a 50/50 shot for many hard questions.

do you have any advice regarding this (have any of you experienced this before reaching superstardom)?

i feel everyone should be getting 100percent correct on the SC Q's, as theres really no excuse to not learn the rules...

thanks for any advice.