"Wie behoort er tot de Nederlandse regering?"
Translation:Who is part of the Dutch government?
Why isn't the 're' in Regering not pronounced the same as that is Regen?
There's a different emphasis: the emphasis in 'regen' is on the first syllable, while in 'regering' it is on the second one. An 'e' with emphasis is longer, while an 'e' without emphasis sounds shorter, more like an 'uh' sound.