You can definitely bring up your Verbal, but it takes hard work. I'd look at MGMAT SC and Powerscore CR.

For Cr, I suggest trying to paraphrase the argument. Dumb down the complexity of the argument as you read, as if you were explaining it to a child. You may want to write down a few short notes to help you. The idea is to ignore the petty details and see through to the author's main point and to the evidence he provides to support his point.

Questions about argument structure often ask about the "methods" an author uses. You already know the flow of the overall argument, now give it an overall purpose and label as an infinitive verb. Common verbs:

to explain to dismiss to theorize to strengthen
to demonstrate to revise to assert to suggest
to interpret to reconcile to challenge to predict

For all Verbal types, look for transitions. Transition words and phrases are like signposts pointing your way through the logic of the sentence, argument, or passage. They tell you what is coming next. "Specifically..." means a more detailed example will follow. "Thus," means a summation is to be expected. "While this may be true..." is a phrase that shows a concession is about to be made. Keep a study sheet of transition words and divide them into categories: Examples, Adding, Contrasting, Emphasis, Resulting In, etc. It's an ongoing process to familiarize yourself with these, but a worthwhile one.

Good luck!

Hi Vinay,
There are various ways you can use to practise for your GMAT. You might need to change your practise style and try this combination to provide you flexibility and different styles to practise so it doesn't get monotonous.

It could be combination of-

1-Books- Books like- The Official Guide for GMAT Review, The Official Guide for GMAT Verbal
Review, The Official Guide for GMAT Quantitative Review etc could be used.

2-Online Study Guide: Websites like Knewton, Grockit etc provide you with practise questions
online.

3-Smart phone applications- Kaplan, Veritas etc offer applications to prepare for GMAT on your
smart phones.