Hi ParulSaini,
With a V23, you would have lost significant points in all 3 major Verbal categories (SC, RC and CR) - so it might take longer than 2-3 weeks for you to significantly improve in all 3 areas. 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?
3) How have you scored on each of your CATs (including the Quant and Verbal Scaled Scores)?
Goals:
4) What is your goal score?
5) When are you planning to apply to Business School?
6) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich