Example sentences of "they have become a [adj] [noun] " in BNC.

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1 State family planning programmes were first introduced in 1968 and since the establishment of the National Population Commission in 1974 , they have become a major government priority .
2 Their calls are also very intricate , and the sounds of some of them , the young , sexually mature humpback males , are so haunting that they have become a best-selling record .
3 They have become a prime target for teenage joyriders who often set fire to stolen cars when they have finished with them .
4 Many Aborigines become disorientated as tribal societies crumble and black independence erodes further — they have become a marginalized minority .
5 Today , with powerful venoms added , they have become a formidable defence system against anything that enters the domain of the spiny fish .
6 And they have become a Trojan Horse to undermine some very basic and strongly-held principles of welfare and the welfare state . ’
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