Morgan and Twelvetrees both crossed for first half tries, while Burns was almost 100% with his goal kicking - his only miss rebounding off the post.
But, it wasn't just about the points scoring. Morgan and Twelvetrees were both hugely impressive in attack, carrying the ball with purpose and creating chances for those around them.
Burns ran the game with maturity, distributed the ball nicely and, as mentioned above, kicked at goal with aplomb.
With Kvesic acquitting himself well at the breakdown and linking play skillfully, it was a good night to be a Gloucester fan.
England had the game won early on. Two early penalties from Burns got England off and running before David Strettle crossed for the first try after a good break from Christian Wade.
Twelvetrees and Morgan were prominent for the second. The centre's break was well supported by Morgan who was grounded just short. His offload found Wade who drew the final man for Twelvetrees to score.
Another Twelvetrees break led to England's third. Launchbury and Wade showed good hands and Morgan had too much power for the defence.
A shell shocked home team could only manage a penalty from Martin Bustos Moyano to go in at half time 25-3 down.
England seemed to lose their intensity after the break. Argentina came back into it, but never really looked like breaking down the English defence.
Stuart Lancaster's side squandered several good scoring chances themselves. Billy Twelvetrees had a try disallowed for a forward pass before Billy Vunipola powered over with the final move of the game to round off the scoring.