Example sentences of "[modal v] not keep up [prep] the " in BNC.

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1 I could not keep up with the demands of trying to keep everyone happy , and in desperation to make sure I keep my looks , I gave up eating , ’ she is alleged to have said .
2 I was just beginning to get to grips with the Campaign for Ink Print Information , but Women 's Tapeover could not keep up with the steady stream of new feminist writing that was emerging week by week .
3 It could now be argued that , throughout the history of the earth , Nature had rewarded those who were able and energetic , and punished those who could not keep up with the race towards higher things .
4 Marthus said that food production can not keep up with the population increase
5 The skua is astonishingly agile for so big a bird , but can not keep up among the throng and gives up .
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