101.   There are some instructive parallels between the two industrial booms and busts, each of which lasted about a generation.

102.   They should last about a week.

103.   These typically last about an hour.

104.   They usually last about a week.

105.   Thornton pleaded for a swift end to the torment that would last about an hour.

106.   This symmetry and perfection lasted about an hour.

107.   Tours last about an hour and a half.

108.   Tours last about half an hour.

109.   Training lasts about a month.

110.   Velez said he could expect enough money to last him about a year and a half.