直到那时米尔先生才意识到他忘记带讲义，把它落在办公室了。

Until then did Mr. Mill realize that he had left his textbook behind in the office.

youdao

直到那时米尔先生才意识到他忘记带讲义，把它落在办公室了。

Until then did Mr. Mill realize that he had left his textbook behind in the office.

youdao