French phrase
Quels ~ ai-je empruntés ?
Meaning
Which ___ did I borrow?
When to use it
A polite question about items borrowed. The inversion gives it a formal tone.
Example dialogue
Quels appareils ai-je empruntés ?
Which devices did I borrow?
Vous avez emprunté un oscilloscope pour le projet et une caméra.
You borrowed an oscilloscope for the project and a camera.