Example sentences of "this must have [be] a [adj] " in BNC.

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1 Since living Nautilus does not have an ink sac , this must have been a protective device evolved at a later stage in cephalopod evolution .
2 For many , this must have been a therapeutic way back into civilian life .
3 Quite often operations could be cancelled at the last moment owing to worsening weather conditions , and this must have been a terrible let-down for them , after getting themselves keyed-up for yet another hectic night .
4 ‘ To him this must have been a familiar sight … ’
5 This must have been a horrible shock to you . ’
6 This must have been a bitter moment for Haile Selassie , but once again he gave no indication of his feelings .
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