--Look! The light in the study is still on. --Sorry, I forgot __ it off.
It suddenly _____ him that he had taken the wrong bus.
To start with the aim of doing harm to others is only to ________ ruining oneself.
Your excuse is too weak to ________ me of your innocence.
You can’t imagine what trouble I had _____ this English article into Chinese.
His handling of the situation was ________, which was spoken highly of later by everyone present.