They can with the overage players, iirc.
There's apparently a clause in Beckham's contract that allows him to play in the Olympics if called up, not sure why it would exist if they couldn't prevent him from going.
If we get in the Champions League that feeling will definitely get me through the summer, combine with Euro's we'll be fine.
I only have a week left of school and I'm not getting shit done because I have to read everything about us.