how, why, where, who, etc. on earth
成語所屬單字earth
how, why, where, who, etc. on earth — 慣用語
1. Used to emphasize a question when you are surprised, angry, or cannot think of a
1.慣用語
釋義
究竟（用於強調疑問）
Used to emphasize a question when you are surprised, angry, or cannot think of an obvious answer.
例句
How on earth did you manage to finish the project so quickly?
Why on earth would she quit her job without another one?