51.   The leather is supple and sturdy enough to last for years.

52.   I suffered a black-out which lasted for several minutes.

53.   Her sad poems grew out of a deep dolor that lasted for months.

54.   Unremitting rain that lasted for six days.

55.   They engaged in a filibuster that lasted for over a week.

56.   Most people believe that the strike will last for at least a week.

57.   The incident sparked off a riot which lasted for three days, and racial tension had been high during the trial.

58.   This visits period lasted for half a term, although for some subject departments it was completed during four weeks.

59.   Expeditions typically last for a three months.

60.   Two separate advertisements will run during the campaign which lasts for eight months, the first between May and August with the second between September and December.