De or het strafexercitie?

The correct Dutch article is:

de strafexercitie

Rule Words ending in -tie and -sie: almost always de. See the rule

How to use strafexercitie

the strafexercitiede strafexercitie
this strafexercitiedeze strafexercitie
that strafexercitiedie strafexercitie
our strafexercitieonze strafexercitie
your strafexercitiejouw strafexercitie
every strafexercitieelke strafexercitie
which strafexercitie?welke strafexercitie?
a big strafexercitie / the big strafexercitieeen grote strafexercitie, de grote strafexercitie