Example sentences of "been [verb] that [det] [noun sg] [noun pl] " in BNC.

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1 It has been shown that most suicide attempters are aware of the existence of agencies where they could obtain help , such as the general practitioner , social workers , or the Samaritans ( Kreitman and Chowdhury 1973b ) ; in fact , a significant proportion of attempters had been in touch with one or more of these agencies in the weeks preceding the attempt ( Bancroft et al. 1977 ) .
2 It has already been noted that some science students had made the choice between science and arts on the basis that it was easier to keep up with arts in one 's spare time than it was to keep up with science .
3 It has frequently been observed that many classroom interactions do not conform to the rules of normal conversation , and this applies particularly to teachers ' use of questions ( e.g. , Barnes , 1969 ; Stubbs , 1976 ; Edwards , 1980 ) .
4 It has been estimated that these subsistence farmers are globally responsible for half of all rainforest destruction , as they march deeper and deeper into virgin forest .
5 Power 's generating monopoly , ministers have been warned that more power stations must urgently be brought on stream to meet projected demand .
6 It has even been suggested that some coral reefs , which it will be recalled are mostly dead coral and debris , are being destroyed rather than built up : they could be relics of higher sea levels .
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