2203703 I'm humming. CK 1 2203702 Who's humming? CK 1 2203706 Tom is humming. CK 1 2111541 Someone's humming. CK 1 1557002 I heard him humming in the shower. brymck 1 953199 Do you know anyone who hums while they work? CK 1 1872484 Tom heard someone humming his favorite tune. CK 1 2203704 We're humming. CK 2203705 You're humming. CK 1769419 She hummed a song. wwkudu 289127 He always hums while working. CK 2955527 Tom always hums while working. CK 19144 Kyoko went away, humming a song. Eldad 277878 The town was humming with activity. CM 31902 Mary often hums a tune as she works in the kitchen. CM 2952250 I heard Tom humming to himself while he washed dishes. CK