Example sentences of "[pron] [am/are] [adv] difficult [verb] [coord] " in BNC.

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1 It is these people who are most difficult to place and who are most likely to be returned to institutions ( Sutter et al. , 1980 ; Intagliata and Willer , 1982 ; Vitello et al. , 1983 ) , where they are likely to remain unpopular patients who are avoided by staff ( Grant and Moores , 1977 ; Raynes , 1980 ) .
2 like those of the South American porcupines , but they are nevertheless difficult to remove and this particular lion faces a painful future .
3 However , whilst its cramped and dark interiors are highly evocative of past centuries , they are also difficult to manage and flout modern fire safety regulations .
4 They are very difficult to protect and are at high risk of terrorist attack when off-duty , ’ added the minister .
5 The members themselves are more difficult to assess and describe .
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