Example sentences of "their [noun sg] must be [adj] " in BNC.

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1 Their budget must be equal to or greater than the minimum total cost of supplying the expected output .
2 But their teaching must be false , or else no one would be saved . "
3 For the system to work at all smoothly from their point of view , the estimates of inflation built into the Treasury 's cash target for their department must be accurate .
4 Their symbolism must be ancient .
5 ‘ Mr. Mounce is away , so if Mrs. Mounce is in the bath their flat must be empty , and she 's probably left the door open .
6 It is surprising that the Commission has failed to recognise that if uncorroborated confessions are to be admitted in court then their accuracy must be above suspicion .
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