"there's something wrong, isn't there?" - tá rud éigin cearr, nach bhfuil?
"he's in trouble, isn't he?" - tá sé i dtrioblóid, nach bhfuil?
"that's a loaded question isn't it?" - tá cealg sa cheist sin, nach bhfuil?
"you're new in this office, aren't you?" - tá tú úr san oifig seo, nach bhfuil?
The audio on the Irish course is a live recording of a native speaker. Assume that it's correct unless someone more experienced than you has pointed out an issue - she sometimes uses forms that are specific to her dialect, or misreads the script, but those instances have all been pointed out many times already.