71.   Driving the Excursions is a pleasure.

72.   Driving the market is a US economy marked by strong growth, low inflation, and low interest rates.

73.   Driving the program is the Marine Corps, which wants its own new plane not dependent on Navy carriers for takeoffs and landings.

74.   Driving the Thunderbird was fun and nerve-racking at the same time.

75.   Driving these phenomena is a never-ending tug of war between the ocean and the atmosphere.

76.   Driving these schools is the theory that students learn more by directing their own research than by scribbling lecture notes.

77.   Driving this change is the fact that chips are simply becoming too complex to design from scratch.

78.   Driving this euphoria is a conviction among investors that gloomy economic predictions have been overstated.

79.   Driving was at a crawl, and holiday fliers were out of luck.

80.   Driving will be the preferred mode of transportation during the holiday weekend, according to a national Auto Club survey.