21.   He knows that he has to prove himself to college coaches all over again.

22.   He wants to prove himself to his superiors.

23.   He wants to prove it to the world.

24.   He videotaped it to prove it to the world.

25.   He wants to prove it to himself.

26.   Her faith seems to be well placed, although not much about his character -- or hers -- is actually developed enough to prove it to us.

27.   Hinkley urged his fellow believers to prove themselves to the visiting Baptists.

28.   I get excited about individual shows after they have proven themselves to me.

29.   I had to prove it to myself.

30.   I have proven myself to the other players.