51.   Grade of employment was used as a measure of socioeconomic status.

52.   He can be compulsive, full of tics that also are used as crutches.

53.   He pointed to the stinking hole that we were to use as a toilet.

54.   He showed her several electronic gadgets, such as a watch that you can use as a phone.

55.   He turned right, keeping close to the shops on his left, using them as a guide.

56.   He warned that influenza could be used as a bioweapon.

57.   Her official stationery is now being used as scrap paper in the royal mail.

58.   His age and frail health should not be used as an excuse to allow him to evade trial.

59.   His work will be used as a basis for future research.

60.   Homework should not be used as a means of controlling children.