my study will start from 1 august, 2017 and my passport is in consulate for adiministrative processing

it’s been 1 month process has started so should i wait and it would be better for me to wait? because VirginiaTech given me option to extend the date about 1 month forward from the given date for starting of study in USA.

You have no other options, other than wait for the admin process to be completed. if you don’t receive it in time, please try to defer your admission to the next semester.