1.   As usual, Marginal revenue equals the price times one minus one over the elasticity of demand.

2.   He looked up one last time at the grey edifice, licking dry lips.

3.   I wear one four times a year, for my quarterly checkout tests.

4.   Perry taps the needle one last time, taps her arm for veins and injects the syringe into a bruise.

5.   The judges reviewed their jottings one last time before selecting the pinot noir as the best wine of the tasting overall.

6.   And I was looking for real ones this time.

7.   Having rarely seen a doctor before, he needed one three times in a week.

8.   But everything has gone wrong for him since he changed his mind and toured just one last time.

9.   A funny one this time, or a scary one?

10.   I was gonna say, we had that one last time.