De or het sponsorwerving?

The correct Dutch article is:

de sponsorwerving

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

How to use sponsorwerving

the sponsorwervingde sponsorwerving
this sponsorwervingdeze sponsorwerving
that sponsorwervingdie sponsorwerving
our sponsorwervingonze sponsorwerving
your sponsorwervingjouw sponsorwerving
every sponsorwervingelke sponsorwerving
which sponsorwerving?welke sponsorwerving?
a big sponsorwerving / the big sponsorwervingeen grote sponsorwerving, de grote sponsorwerving