21.   Ordering and analysing the output of the mass media obviously pose particular problems.

22.   Speyside was an area where the lack of adequate housing had provided particular problems in keeping family farms going.

23.   The first step is identifying your particular problem.

24.   The relative merits of both approaches have to be considered when opting for a solution to a particular diagnostic problem.

25.   The risk management service will cover particular problems such as legislation, contamination, production disruption, quality standards and health and safety.

26.   The way pupils use sexually abusive language to insult each other presents particular problems for teachers.

27.   There is a particular problem with contemporary history.

28.   This particular problem is of no real mathematical interest.

29.   Three particular problems call for comment, however.