21.  She became not only an equivalent of a cabinet member but the most powerful one.

22.  That would enable drug makers to negotiate with multiple health care providers instead of a single powerful one, the federal government.

23.  That last argument is a powerful one that Islamabad recognizes.

24.  The Con Ed site has a powerful one in the U.N. headquarters, which itself is now facing the need for expansion and repairs.

25.  The concept is a powerful one.

26.  The engine is the most powerful one ever approved by the FAA.

27.  The fusion of fashion and sports can be a powerful one.

28.  The grown-ups, or at least many of the most powerful ones, have disappeared from this provincial capital on the arid Russian steppe.

29.  The majority leader runs the floor debates in the Assembly, moving bills through and organizing debates, making the position a powerful one.

30.  The tax issue is a powerful one for Republicans.