hello, why the "t" in "vårt" ?
Because svar is an ett-word.
Can I say reply instead of answer?
Added it now. :)
In which context such a sentence would be used? It seems very weird to me.
Why isn't "response" accepted?
Sure, I've added that.
In past lessons, I heard "De" pronounced as "Dom". Here it isn't.
dom is the much more common way, but both are correct. The new voice appears to use the de pronunciation always.