How to use "base" in a sentence

He ran to a nearby streetlight and pulled some wire from a metal box at its base

But now it lay at an angle, the base against the wall, the easel itself slanted, chalkboard-down, across a game table

A chill spread from the base of his spine, up his back, as he realized what the presence of these men implied about the accident that had killed Danny.

The sound of drums came from the army base in Albany Street and bells were ringing in every church