impregnable

[ɪmˈpregnəbl]
adjective

1.	[impenetrable] inespugnabile

2.	(fig) [in very strong position] imbattibile

similar words

impregnable

French

Spanish

German

Complétez la séquence avec la proposition qui convient.

To be accepted, applications … before 1st September.
- should have sent
- should send
- should be sent