81.   Most of these have serious methodological problems.

82.   Several of these issues have raised serious problems during the year, primarily arising out of the present economic climate.

83.   Youth unemployment is now a serious problem in Britain and many under the age of twenty five have never had a real, permanent job.

84.   As we shall see this method reveals a serious problem, one that a component-by-component analysis tends to conceal.

85.   Treating to as meaningless in some or all of its uses with the infinitive raises several serious problems however.

86.   Design defects may pose more serious problems.

87.   The rapid building of cheap, poor quality housing was to provide a later generation with serious problems.

88.   These are serious problems, which need to be addressed carefully.

89.   Yet this very fact raised two serious problems for the structure of enterprise.

90.   They have made some suggestions for ways of improving the parenting provided, but there are serious practical problems in achieving a good standard of care.