She tried to keep the incredulity out of her tone.

Kelson asked, trying to keep too much interest out of his tone.

It was hard to keep the accusation out of her tone.

He didn't even try to keep the disgust out of his tone.

He tried to keep any hostility out of his tone.

She didn't even try to keep the bitterness out of her tone.

I tried to keep all irony out of my tone.

He couldn't quite keep the challenge out of his tone.

It required an effort to keep the laughter out of his tone.

He could not keep the satirical edge out of his tone.