21.  Instead, businesses have been the main driving force behind recovery.

22.  It assumes that economics is the main driving force behind the California exodus.

23.  Its new strategy is supposed to end the practice of controlling supplies in favor of promoting demand for diamonds as the main force in the diamond business.

24.  Johnson became separated from the main force, temporarily lost over cloud-covered mountain tops.

25.  Karadzic is seen as the main force against the agreements.

26.  Kennedy was the main force pushing the patients-rights bill through the Senate last month after it had been stalled for nearly five years.

27.  Lee wanted to concentrate the troops and defeat the main Union force.

28.  Mines are slowly being cleared by U.N. forces, but the job will only have begun when the main American forces arrive.

29.  Ms. Riedel, an Australian, relied more on main force, and occasionally fell prey to wildness and wooliness, especially in her upper register.

30.  Now, it is the main force behind his successor, President B.J. Habibie.