Bet or check?

[PokerBob]

canterbury 15/30 9 handed
I do not know how to play poker. Please teach me.
SB here i know very little about, other than he is about 60 years old, is dressed in a sweatsuit, has on many gold items of jewelry and earlier was on the phone discussing tomorrow's football lines. EP is a regular who plays OK and knows who i am. BB is a big dummy.

EP limps, folds to me on the button with 6 [img]/images/graemlins/heart.gif[/img]6 [img]/images/graemlins/spade.gif[/img], I raise, SB calls, BB calls.

Flop (4 players): A [img]/images/graemlins/diamond.gif[/img]3 [img]/images/graemlins/diamond.gif[/img]4 [img]/images/graemlins/heart.gif[/img]

checks to me, I bet, SB calls, BB folds, EP folds.

Turn (2 players): 3 [img]/images/graemlins/spade.gif[/img]
SB checks, I........