Example sentences of "[Wh adv] do we know [adv] " in BNC.

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1 How do we know where they 've gone ? ’
2 However , there is a debit side as well : how do we know when we have reached the limits of predictability and ‘ bottomed out ’ on the residuum of free choice ?
3 How do we know when it was written , and the date of the copy we possess ?
4 This chain theory collapsed partly through its own incoherence under pressure — how do we know when we have got all the links ? — and partly because of the discovery of past faunas .
5 How do we know how difficult something is ?
6 The problem here is an obvious one and has already been alluded to , namely how do we know how good an indicator is if we can not compare the phenomenon with the indicator ?
7 We when do we know when what what we 're going to get next year from D O E.
8 Why do we know how much be ? .
9 It 's a common disease , so why do we know so little about it ?
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