700 in GMAT Prep. What can be expected in Real test ?

GMATPrep is the most accurate indicator of your true ability. If you can score 700+ on GMATPrep2, you should feel confident that you will get a 700+ on test day (assuming you can stay calm throughout the exam).

Your analysis of the GMAT Verbal section is a bit dangerous and inaccurate. You scored V37, so you didn't see very many of the most difficult questions. There's a significant difference between the difficulty of questions at the V37 level and the those at the V45 level, which is why V45 is in the ~98th percentile. You can benefit greatly by simply practicing all three areas in the Verbal section, but you'll see an even greater improvement if you study the underlying rules of sentence correction with a book like MGMAT SC.

Most test takers underestimate the difficulty of the Verbal section - don't let that happen to you