Example sentences of "[noun pl] have [been] [art] key " in BNC.

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1 The search for personal inadequacy and behavioural defects has been the key focus of such research and policy .
2 Although such linkages have been a key feature of the development work done in the Central Institutions , linkages have also been set up between HNC/D courses in Further Education Colleges and both CIs and Universities .
3 The explosion of television outlets has been a key factor in this trend .
4 Conceptualizing the nature and significance of markets has been a key element in economic and political thought since Adam Smith 's Wealth of Nations , published in 1776 .
5 Most recently , societies ' ambitions to expand and diversify their operations have been a key factor behind the major package of new legislation introduced into Parliament in 1986 .
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