Hi warrior1991,
"700 level" CR questions represent a relatively small sub-set of the questions that you'll face on Test Day, so you might actually be better served at this point by working on other (re: larger and more-frequent) areas before you work on a bunch of tougher/rarer/harder question types that you might not see at all on the Official GMAT.
Before I can offer you the specific advice that you’re looking for, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How long have you studied?
2) What study materials have you used so far?
3) How have you scored on EACH of your CATs/mocks (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) What is your goal score?
5) When are you planning to take the GMAT?
6) When are you planning to apply to Business School?
7) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich