She caught the sound of a boot scraping in the dirt street outside.

From somewhere distant, they heard the sound of boots scraping.

At the sound of boots scraping behind him, he bounded to his feet and turned.

Conrad was about to step forward when his boot scraped the stone.

His body moved and a boot scraped the gritty floor.

There were sounds again of boots scraping stone as the man approached.

Despite his care, his boot scraped on the rock as he moved into position behind and above the two.

The heavy boots scraped on the stone of the walkway.

The flooring was clean and their boots scraped on a different surface.

Their boots scraped on the floor; we could just see them from beneath our tarpaulin.