31.   A series of parliamentary questions has been asked about the funding of books in education.

32.   A series of payments used to be the exception rather than the rule.

33.   A series of poor harvests plunged them into debt.

34.   A series of predictable actions and reactions gradually erodes their adaptive resources.

35.   A series of public demonstrations have been held in cities across the country.

36.   A series of rescue attempts ended in failure.

37.   A series of review panels wrestled with the problem and provided a series of responses.

38.   A series of simple push-buttons on the solid state device enables the required temperature range to be set precisely.