71.  A security device might allow one person to enter, but phone the police if it detects a known burglar.

72.  A series of half-stop under- and over-exposure gradations will usually produce one frame which is satisfactory for each.

73.  A service company makes its profits by hiring people at one price and selling their time at a higher price.

74.  A shinbone was broken, twisted - as was the ulna in one arm, and several ribs.

75.  A shudder ran through her as she suddenly remembered one very valid point.

76.  A single aspidistra gleamed in one corner in a lime-green ceramic pot.

77.  A sketch of Don Quixote hangs on one wall between two book-cases.

78.  A slap on the hand or the behind works like a charm for one parent-child combination.

79.  A slight variation in this household was that one social worker stayed behind.