one-track mind

He could see that the moving man had a one-track mind.

I think she was perfectly happy, sticking with a one-track mind to the problem at hand.

He had a one-track mind, and the track was already occupied.

If I can get your one-track minds off girls for a moment, though, let me tell you something about the place.

The sergeant, though, seemed to have a one-track military mind.

The kid had a one-track mind, that was for sure.

Washington has neighborhoods but is a city with a one-track mind.

Her sister, Jenny thought, had a one-track mind and didn't have a whole lot of imagination.

The major had strong opinions and what seemed to be a one-track mind.

His one-track mind was making a much more specific charge.