Example sentences of "but it [be] now know that " in BNC.

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1 Hyenas have always been thought of as scavengers but it is now known that they are also vigorous nocturnal hunters .
2 The details of the legend 's growth are obscure , but it is now known that it was developing steadily in northern Spain and southern France in the centuries between the eighth and the eleventh .
3 This was a time of panic , in which one farmer alleged that a thousand of his sheep had been killed by these parrots ; but it is now known that they rarely kill sheep .
4 Until quite recently it was considered that it was the crust that attained equilibrium with respect to the mantle , but it is now known that isostatic adjustments also involve the rigid mantle forming the lower part of the lithosphere .
5 But it 's now known that Mrs Law was last seen alive just after lunchtime on Sunday .
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