De or het klepzitting?

The correct Dutch article is:

de klepzitting

Rule Words ending in -ing: almost always de. See the rule

How to use klepzitting

the klepzittingde klepzitting
this klepzittingdeze klepzitting
that klepzittingdie klepzitting
our klepzittingonze klepzitting
your klepzittingjouw klepzitting
every klepzittingelke klepzitting
which klepzitting?welke klepzitting?
a big klepzitting / the big klepzittingeen grote klepzitting, de grote klepzitting