21.   Public dissatisfaction with schools has helped fuel the push to change teacher contracts, several school board lawyers say.

22.   Renewed optimism that key companies in the computer industry will report strong second-quarter profits helped fuel the rebound.

23.   Shares of auto companies helped fuel the rebound amid optimism that the economy is strong enough to fuel more car purchases this year.

24.   Shares of auto companies helped fuel the rebound, amid optimism that the economy is strong enough to fuel more car purchases this year.

25.   Such threats are helping fuel a search for new ways to combat smallpox and related viruses, including the development of new kinds of anti-viral drugs.

26.   That, in turn, helped fuel the growth of college and high school groups.

27.   The approach of winter in Brazil is helping fuel the rally, since traders are growing concerned that frosts could reduce production.

28.   The approach of winter in Brazil is helping fuel the rally because traders are concerned that frost could reduce harvests.

29.   The approach of winter in Brazil also helped fuel the May rally because traders were concerned that a frost would damage trees and reduce production.