1 B1 ニュートラル
人や物に何が起こるか、特に最終的な運命や現在の状況についていうこと。
"I often wonder what became of the friends I had in primary school."
“
Whatever became of the heroes of yesterday?
— Common rhetorical phrasing; similar expression appears in David Bowie's song 'Heroes' cultural discourse and various literary sources.