He is an explorer ________ a sailor.
Our headmaster isn’t in his office. I can’t find him anywhere. Did you notice him ______ the office?
You must keep your eyes _____, let’s begin the game.
Thanks for ________ the secret ________ me.
When we practice speaking English, we often end up ______in Chinese.
Would you mind me how English words? A. tell; to remember B. telling; remember C. telling; to remember