Today, I took my first GMATPrep test and scored misirable 640

(Q46;V32), while I expected to reach 700+
I got:
- 17 quantative questions wrong, which resulted in 46 (I expected that Q section would be easy, but it was quite similar to GMAT challenges

)
- 11 verbal questions wrong (7 wrong RC, 1 wrong CR, 3 wrong SC), which resulted in ONLY 32 (may be this low score is because I made two mistakes in the first 10 questions? Or, it is because the requirements are stricter for verbal part than for math part? Please, express your thoughts on this issue)
Can anybody tell how many wrong questions he/she got wrong on GMATprep and got 39+ in verbal part?
AND
How many wrong questions he/she got wrong on GMATprep and got 50+ in Q part?
I have my GMAT appointment on September, 4th. Can anyone suggest how to improve my verbal results further???