Bob made a visible effort to compose himself, then went on in a lower tone of voice.

He went on in a more conciliatory tone of voice.

I went on, in a more upbeat tone, "You have the keys for her apartment?"

As if she hadn't touched him, he went on in a mild tone of voice.

Before Sparky could think of an answer the man went on, in a slightly different tone.

Then she went on, in a much more measured tone.

I mean it,' she went on in a tone that carried no emotion.

Taking a deep breath, she went on, in a milder tone.

"I don't want father to hear about the men," went on Tom, in a low tone.

He stopped for a while, then went on in a musing tone.