71.   Its almost instant success persuaded casino operators that the rules had changed, that the days of stiff drinks and bland food were over.

72.   It will be broken unless the rules change.

73.   Middle-aged physicians are angry that the rules have changed so markedly in midstream, and a number of them are leaving medicine entirely.

74.   New rules will change the kicking game in the NFL this season.

75.   New government rules briefly changed the criteria for the armed escorts required on school field trips, scout excursions and other hiking trips.

76.   Now, the rules have changed.

77.   Next year the rules will change yet another time.

78.   Of course, the rules are changing.

79.   Now, with anthrax being used as a deliberate weapon, the rules have changed.

80.   Now the rules have changed.