Example sentences of "[conj] it [is] difficult to know " in BNC.

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1 In this respect MI6 has had a number of successes although it is difficult to know how useful defectors really are ( see Chapter 2 ) .
2 Benidorm is such a terrific holiday resort , with so much to do , that it is difficult to know where to start .
3 Light is such an absolute , yet such a commonplace , that it is difficult to know where to start when discussing it .
4 These changes are so recent that it is difficult to know if we are beginning a series of cyclical changes or a once-for-all transition to a new , low fertility regime .
5 Christianson & Loftus ( 1987 ) , unfortunately , report their data in such a way that it is difficult to know whether retrograde and anterograde effects were present , however , there was clearly no interaction of effects with retention interval ( 20 minutes versus 2 weeks ) .
6 But erm so , so it 's difficult to know exactly what 's happening now , and unless I see it in the office .
7 It is not advisable to attempt this walk in conditions of poor visibility since the plateau is featureless and it 's difficult to know when you are close to the Ben Crom crags .
8 ‘ The workers have not followed the proper dispute procedures , they have no legitimate grievances and it is difficult to know what they want . ’
9 The use of propaganda to make this behaviour unfashionable again has been suggested ( Stanley 1969 ) , but no health education programme has ever been put forward to this purpose and it is difficult to know whether such an approach would be feasible .
10 And it is difficult to know how they will be heard .
11 This is not particularly elegant and it is difficult to know how to pronounce it .
12 There is a substantial group of patients , however , in which the cause is not obvious and it is difficult to know how far to investigate .
13 But it is difficult to know whether their defence of the Masai in such cases should be attributed to the peculiarly seductive qualities of this people , or to the well-documented tendency of District Officers throughout British Africa to become closely identified , in a paternal and proprietary way , with the interests of ‘ their ’ tribe .
14 decision but it is difficult to know which way to go , when you 're actually up you know , I , I would n't say you 're a hundred percent but I would n't say
15 This being said , it is extremely difficult to assess whether net environmental quality is being maintained or improved , since it is difficult to know what value future generations will place on the environments that will be damaged under MPG6 in order to feed development demands .
16 This being said , it is extremely difficult to assess whether net environmental quality is being maintained or improved , since it is difficult to know what value future generations will place on the environments that will be damaged under MPG6 in order to feed development demands .
17 Avoid all restaurant or take-away food during this time as it is difficult to know what you are eating .
18 However , as it is difficult to know the history of every disk you are presented with then it is better to be safe than sorry .
19 However , as it is difficult to know the history of every disk you are presented with then it is better to be safe than sorry .
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