He never pays attention to what I say anymore. He's so preoccupied and in a world of his ......

He never pays attention to what I say anymore. He's so preoccupied and in a world of his ...... (*) own (*) self (*) mind (*) brain


This is a companion discussion topic for the original entry at https://english.best/questions/18839,he-never-pays-attention-to-what-i-say-anymore-hes-so-preoccupied-and-in-a-world-of-his-___/