July 22nd is SOON. I don't mean to scare you off, but a 700+ is most likely off the table unless you've already got some amazing Quant skills and a good intuitive grasp of English grammar. I'm assuming you might be a non-native speaker?
Check out this article first:
https://gmatrockstar.com/2014/02/03/10-t ... -the-gmat/
It discusses how you can quickly tackle Verbal from a non-native perspective.
Next: BUY MGMAT Sentence Correction. I don't work for MGMAT, but this is one of the best grammar-building books on the market for GMAT. Dive into it and hit it hard, cover to cover, doing the corresponding OG13 questions in the back of each chapter.
I'd also suggest you become a regular watcher of the "Thursdays with Ron" videos.
Finally, don't waste your time doing tons of CR and RC questions before you have a good strategy in place. Since you're short on time, I'd do some serious research on how to break down a passage, identify question types, come up with predictions, and use process of elimination when evaluating answer choices NOW. Do not waste time. Either read up on CR and RC strategies online or work with a respected tutor. You don't want to get pointed in the wrong direction.
