11.   Both candidates now face the challenge of sustaining the interest of voters without turning them off.

12.   Actors and director must do most of the work of sustaining interest in the goings-on in the family farmhouse during a tense holiday weekend.

13.   All the same, their overlong dialogue on an election that fails to sustain its interest leaves the reader with the aftertaste of a hermetically self-absorbed world.

14.   But at least the plane enthusiasts had something tangible to help sustain interest.

15.   But for all its considerable missteps, the picture sustains our interest to the end.

16.   But none of this really connects in the sense of sustaining dramatic interest.

17.   But often the musical materials seem thin, neither intricate nor varied enough to sustain interest consistently.

18.   But some of his critics wonder whether he can sustain his interest in a domestic agenda.

19.   Can a sitcom based on one gimmick sustain interest?

20.   Can we sustain our interest in this dull duo for another year and a half?