general blind defense

Villain is new to table, no reads.

Party Poker 3/6 (6 max, 5 handed)

Preflop: Hero is BB with A[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/club.gif[/img].
1 fold, CO raises, 2 folds, Hero calls.

Flop: T[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/diamond.gif[/img]
Hero checks, CO bets, Hero folds.

this is way too weak with ace-high. should i check-raise this ragged flop? if i check-call, what is my line on a blank turn?
fold preflop?