I was trying very hard to keep my voice level.

It took every bit of control she had ever learned to keep her voice level.

He tried, without much success, to keep his voice level.

Trying to keep her voice level, she said, 'None of this makes any sense to me.

You will need to keep your blood sugar levels within a safe range.

She tried to keep her voice level with only partial success.

I asked in real surprise, keeping my voice level with an effort.

Kirk had to make an effort to keep his voice level.

It took all Eve's control to keep her voice level.

These can help you keep your blood sugar levels on target.