51.   These low levels of activity were in keeping with the enormous silences of the cathedral structure.

52.   They do not tell us why the level is set at its current average rather than some much higher or lower figure.

53.   This high level of growth is largely attributable to the current extremely low level of industrialisation.

54.   This time the equilibrium level of income is above the full employment level and so can not actually be attained.

55.   Treasury ministers argue that the present levels of interest rates are part of a policy of reducing inflation.

56.   Urinary bilirubin levels are negative since the level of conjugated bilirubin is normal or only slightly increased.

57.   When low levels of lead oxide are present there can be a problem of dissolving the copper in the glass.

58.   When peak levels of the drug are required, the blood sample must be drawn at a specified time after drug administration.

59.   Although crimes against visitors were falling, the levels of crime were still too high for comfort.