61.  And who was the driving force behind a pairing?

62.  And then there are skin-cancer concerns, which seem to be the driving force behind many hat sales these days.

63.  Any possibility is the driving force.

64.  Another driving force is complaints from people who cannot get a single permit, even as some profit-making companies have scores.

65.  As chair of the Republican Task Force on Reform, Hoekstra has been a driving force behind attempts at reform.

66.  As before, the driving force is fear, and observers are enmeshed in controversy over what action to take.

67.  Assemblywoman Sandra R. Galef, a Westchester County Democrat, has been a driving force behind the changes.

68.  As much as that counterculture was mobilized by antiwar sentiment, its driving force was really drugs, and not only psychedelics.

69.  Asked why the administration decided to participate in the Ottawa process, Rubin said the driving force was the early September deadline.

70.  At one time, dynamic conductors were the driving force in opera.