Humming loudly, he began returning the books to their places.

It was about three o'clock in the morning when the telephone warning hummed loudly through the ship.

Bosco's mouth is suddenly closed but he's humming loudly at the ceiling.

Then the silver pen hummed loudly and all her worries went away.

The refrigerator was humming loudly, like an old train chugging up a hill.

No one said anything, the air conditioners continued humming loudly.

He threw a switch on the box and it began to hum loudly.

The men began to sing again, and Rubio hummed loudly.

When the engine began to hum loudly, I permitted myself to moan in pain.

I hung my jacket over a kitchen chair and ignored the refrigerator, which was humming loudly.