我哥哥有时候真是个讨厌鬼。

My brother can be a real ___pain ___in ___the ___neck sometimes.

他很可爱，但有时候真的挺烦人的。

He's adorable, but he can really be a ___pain ___in ___the ___neck sometimes.

应付工作中那个老是抱怨的人真是件烦心事。

Dealing with that constant complainer at work is a real ___pain ___in ___the ___neck.