11.   He hummed a tune for a drummer, and listened as she played it back to him until the rhythm was crisp.

12.   I hummed a tune under my breath, pretending not to notice what was happening.

13.   It is perhaps most appealing to school-age children who can hum the tune while puzzling out the illustrations.

14.   Nobody was humming a tune.

15.   Nick Cage has been humming that tune.

16.   No one will be humming these tunes when the lights go down.

17.   Now, I can hum that tune.

18.   Some hum the tunes, others send in chord structures.

19.   Some people tend to daydream or hum a tune when they walk down a New York street.

20.   The introspection of other songs should keep his cult followers speculating, leaving less committed listeners to hum the tunes.