GMAT Verbal Section | Re: ALL GMATPrep questions VERBAL/Quant

Great thanks!. Also, one help I may ask you for in relation to Verbal.

I think I have good understanding of verbal concepts, and I usually have a good accuracy when I do OG questions.
However, during exam, I fell straight flat and my accuracy seems to drop by 80%. Usually, I get 1/10 wrong, and on exam, I get 7/10 wrong!!
Is there something I am missing, for example I am practicing from material that's not true representation of Gmat like ques, etc.

I am really confused at this stage, as I