回答

・what happened?
・what's one's deal?

「這是怎麼回事？」可以用英語表達為what happened? 或 what's one's deal?。

You look completely different from when you were in high school, what happened?
（你看起來和高中時完全不一樣了，這是怎麼回事？）
※ completely（完全）

Until last week, you were so motivated, what's your deal?
（直到上週，你還有動力，發生甚麼事情了？）

有幫助｜0