1.   For basketball fans, there has lurked the possibility of yet another sequel.

2.   For a single person, just about the only romantic possibilities lurked on the lower decks, where the crew was housed.

3.   Most people alive today do not remember a world without anti-microbial agents, when the possibility of death lurked in every cough or upset stomach.

4.   While terrorism is not the primary worry of most fearful travelers, the dread possibility always lurks in their minds, therapists say.