71.   A number of authors, whose work will be considered below, have attempted explanations largely in terms of social class.

72.   A number of backing off formulae are possible which aim to provide the best approximations to the probability of the transitions.

73.   A number of banks and building societies are paying generous rates to cash Isa customers.

74.   A number of bird sanctuaries were seriously affected by the oil spill.

75.   A number of bird sanctuaries were seriously affected by the spill.

76.   A number of bodies were recovered from the wreckage.

77.   A number of brewers now use a device called a cask breather on low volume beers to prolong their life.

78.   A number of celebrities were in attendance.

79.   A number of changes were introduced to the curriculum.

80.   A number of chemists had experimented with the polymerisation of ethylene using catalysts.