1.   A single lapse of concentration cost Sampras the game.

2.   Either way, she will relish a return to a soft surface here, and it could well pay to forgive her single lapse.

3.   But each day, a subway motorman must neutralize the monotony with the realization that a single lapse could cost other people their lives.

4.   Now the villagers, all living in tents and containers, attributed their tragedy to that single lapse.

5.   Everybody is well aware that one single lapse can be oh-so-costly.