Example sentences of "have been [det] of [adj] [noun] " in BNC.

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1 Undoubtedly the most significant of these in the context of lasers has been that of inhomogeneous broadening , to which we will return .
2 Another line of attack has been that of some psychologists who have concentrated their fire on the question whether the type of experimental procedure designed to produce associative learning in Aplysia can ‘ really ’ be said to fulfil the conditions required for classical conditioning .
3 The programmers who designed them may have been any of these things , but that is irrelevant .
4 But that had been all of thirty years ago , and very quickly these demands had multiplied , absorbing more and more time and energy , so that the moments of evening meditation were soon subsumed into the preoccupations and stresses of an active Christianity .
5 Arthur had been all of those things himself : hunter , warrior , then king . ’
6 When ( Labour ) tries to define a programme capable of rallying the masses at the next general election , it falls back , not on a specifically socialist programme , but on the old programme that half a century ago had been that of bourgeois liberalism in England .
7 The actual sphere of competence the church had sought to monopolize had been that of sexual morals , temperance , the semi-private sphere of the family , and education .
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