He spoke rapidly as the warning tones sounded behind him.

"I never asked him," she said, a slight warning tone in her voice.

There was a warning tone in the big man's voice that caught Tambu's attention.

The low-speed warning tone came on for the seventh time.

"And one other thing," she said with a warning tone.

A few moments later a warning tone sounded in their headphones.

In addition, a warning tone or bell is sounded 1:20 into the exercise.

At the same moment, the warning tone began to drop.

She returned to the prep center as the sponge-space warning tones began.

There was something in the governor's words that struck a warning tone.