Hi, after two weeks of study I did the first pprep cat; I am happy with my Q since I didnt do stupid mistakes and answered all right, however my problem is with SC, and it leads to a time shortage at the end of the test.

I had a total of 11 wrong and 19 correct answers, 9 of the wrong ones are SC!! I read the Manhattan Review SC, it is really great but it seems I just can not apply a strategy to attack SC in a fast an efficient way and once I am down to 2-3 choices I just use my ear, which is most of the wrong since I am not native. Any ideas is really appreciated since I plan to take the exam in 3 weeks?

Is there a list of common idioms for GMAT that I can study regularly? My plan is to attack OG10 and 11 with the guidance of Manhattan also review each correct and wrong answer, but I am not sure if it is going to work or not. I do not have a serious problem with RC or CR since I believe I am quite good in English however I was never really that much into grammar rules when I was in UK! Do you think Kaplan or anyother book may help me about general strategies or is it best to practice on OG Qs and take notes of certain idioms phrases etc to get myself familirize with them?

Thank you in advance!