opt 9个月，h1b 3个月，能不能用first year choice file as resident

My status:
Came us on 8-16-2002, graduated on 12-12-2004
from 01-10-2005 to 9-29-2005 used opt to work
from 9-30-2005 to 12-31-2005 used h1 to work
My wife is h4 and we married in china 2002
my company withheld my ss & medicare tax for the whole last year

请问能不能先file extension, 再用first year choice file as resident for the whole 2005?如果可以能否拿回opt期间的ss & medicare?