($22) Simple question. Please help

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Seems I forgot how to play poker since my recent downswing. I am sure this is a simple question. What do you do on the river? Check or bet and if bet, how much?
Villian is typical $22er donk.

Party Poker No-Limit Hold'em Tourney, Big Blind is t50 (8 handed) converter

Hero (t1940)
MP1 (t915)
MP2 (t815)
CO (t740)
Button (t655)
SB (t810)
BB (t1350)
UTG (t775)

Preflop: Hero is UTG+1 with A[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, Hero calls t50, <font color="#666666">5 folds</font>, BB checks.

Flop: (t125) 3[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets t50</font>, <font color="#CC3333">Hero raises to t125</font>, BB calls t75.

Turn: (t375) 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets t50</font>, <font color="#CC3333">Hero raises to t275</font>, BB calls t225.

River: (t925) 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, Hero ?