Another blind dilemma

[Clownfish]

Do you call or fold river? and do you keep firing on turn?

Party Poker 0.5/1 Hold'em (10 handed) converter

Preflop: Hero is SB with 7[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls, <font color="#666666">1 fold</font>, MP1 calls, <font color="#666666">4 folds</font>, Hero completes, BB checks.

Flop: (4 SB) 7[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets</font>, BB folds, UTG+1 calls, MP1 calls.

Turn: (3.50 BB) 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, UTG+1 checks, MP1 checks.

River: (3.50 BB) 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, UTG+1 checks, <font color="#CC3333">MP1 bets</font>, Hero calls, UTG+1 calls.

Final Pot: 6.50 BB

Results in white below: <font color="#FFFFFF">
Hero has 7d 4d (two pair, queens and sevens).
UTG+1 has Ac Kh (one pair, queens).
MP1 has Tc Ts (two pair, queens and tens).
Outcome: MP1 wins 6.50 BB. </font>