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

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1 Since the pioneering work of Henry Clifton Sorby ( 1851 ) , slices of rock ground thin enough to transmit light have been the staple material of sedimentary petrography .
2 The major limitations of therapy have been the presence of large stones ( >15–20 mm ) , large and tortuous ducts , non-dilated ducts in which the basket can not expand , and a stricture distal to the stone(s) .
3 It would not , they say , have abolished competition : his ‘ Grand Lodges ’ , each directing its own industry , would in effect have been the head offices of huge joint stock companies owning the entire means of production and subject to no control by the community ; and they would have been able to revert to the capitalist form of enterprise , admitting fresh generations of workers only as employees and not as shareholders ‘ thus creating at one stroke a new capitalist class and a new proletariat ’ .
4 Both the Listening Test and the Grammar Test have been the subject of rigorous research over a number of years , with up to forty different nationalities of students .
5 As Shahid himself admits , the sight of Ian Salisbury wheeling away so productively at Lord 's might have been a factor in this sudden show of faith .
6 Helen 's main problems since she moved into her own home have been a period of illness , which caused her much discomfort , and a spate of difficulties in accepting personal care from temporary staff .
7 The causes of the development of trade unionism within the public sector have been the subject of a good deal of political debate and social science theorizing .
8 The activities of the far right have been a cause for concern over here for a while now .
9 The major sectors witnessing recovery have been the shipping and the natural resources sectors .
10 All agree that the main beneficiaries of the indigenization process have been the state functionaries and those few Nigerians who now sit on the boards of TNCs ( see Ake , 1985 ; Hoogvelt , 1979 ) .
11 Syn-gas and carbon monoxide have been a mainstay of the heavy organic chemicals industry around the world for some years .
12 But Labour Councillor , Tom Richardson , defending his party 's chosen budget says the problems with the Poll Tax have been the government 's own making :
13 EC plans for a carbon tax have been the cause of prolonged infighting within the commission and several member states as well as European industry .
14 It threatens the worst for John Ryan , Wyllie 's Welsh counterpart , for whom 15 short months in charge have been an eternity .
15 The Willses ' most obvious contributions in the sphere of education have been the founding and development of the University of Bristol .
16 The nature of these indicators , and related concepts of efficiency , effectiveness and economy have been the focus of much debate .
17 The reasons for this pattern have been the subject of long and sometimes acrimonious debate ( see Trotter 1949 ; Trotter 1950 ; Jones , 1951 ; Wellman 1950 ) .
18 However , two changes that have occurred in the power game have been the awakening of concentrated industrial or union power , which rested like a sleeping giant for nearly a century , and the emergence of consumer power .
19 But the Chinese Muslims are spread throughout the country , from Xinjiang in the north-west right along the Great Wall of China as far as Peking and dotted throughout Ningxia province , including such key cities as Xian , home of the famous terracotta army , where the Chinese-style pavilions of the Great Mosque have been a place of worship for Muslims since the eighth century .
20 Not many Nationalists would applaud Mrs Thatcher to the echo : her intransigence and belligerence have been a source of conflict .
21 The conditions of his social scientific success have been the denunciation of the Parisian intellectual avant-garde , which he is at the same time quite integrally part and parcel of .
22 As the right hon. Gentleman knows , this Conservative Government have been the leader in Europe for the past 12 years .
23 Unfortunately , Mr Mukhametshin 's past attempts at exporting have been a disaster .
24 Instead , the information disseminated is designed to make too many people comfortable with the idea that these horrifying centuries of murder and pillage have been a fight for justice and democracy .
25 On the whole , the champions of the literal approach have been the party attempting to strike down a particular clause whilst the object and intent approach tends to favour parties who are attempting to uphold the restraint .
26 More recently , investments in South Africa , in tobacco and drug companies and in firms using animals for experimentation have been the subject of protest and workers have tried to influence their pension fund managers away from these .
27 Sports Centres , Leisure Centres and Office complexes frequently do not have a piano — as we all know , lessons using alternative accompaniment have been a feature at Q.T. Day for many years now .
28 Of course absence from school and periods in hospital have been a disadvantage to her , but she has survived as a cheerful and courageous person .
29 The low standards of residential care have been a topic of concern for many years .
30 The main barriers to growth have been the complexity of using the systems , their inability to handle anything but the simplest graphics , the high cost of connect-time charging and poor publishing decisions about which databases to offer online .
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