Example sentences of "problem [prep] [noun sg] [vb past] be " in BNC.

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1 William Thompson , Lord Kelvin , the celebrated physicist , thought that all the basic problems of physics had been solved , though a number of relatively minor problems remained to be cleared up .
2 The problems of diversification had been enormously increased ‘ because the interdependent conditions have not been fulfilled ’ .
3 The rapid development of social movements during the 1960s depended in part upon sustained economic growth , full employment , the expansion of higher education , and a general feeling that these societies had entered what was often called a ‘ post-scarcity ’ era in which the fundamental problems of production had been solved and the conditions created for the development of a new society of leisure and enjoyment .
4 Since , according to the group — ‘ the Sits ’ as they became labelled in Britain — the problems of production had been solved , the question was one of consumption .
5 The borough council 's director of economic development Barry Keel said initial problems over funding had been solved and the centre should be finished by August 31 .
6 The problem of replacement had been made particularly acute because of the lack of repair and replacement in earlier years , especially during the war and civil war .
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