stepping-stone

[ˈstepɪŋ-]
noun

1.	[in river] pietra f di un guado

2.	(fig) [way to success] gradino m

similar words

stepping-stone

French

Spanish

German

Complétez la séquence avec la proposition qui convient.

We didn't open the door because we … the key.
- couldn't find
- could find
- could