How did you do it?

Although it was a warm early summer afternoon, we had a great English lesson. It began as a boring G.E. lesson but in the middle of the lesson, Mr. Yeung stopped teaching because he saw that most of us were dozing rather than listening. "Let me show you a magic," he suddenly said loudly. We were wide awake then. He put a coin on the teacher's desk and then slowly placed a book on top of it. Bending over until his mouth was just an inch from the book, he shouted, "Go!" He asked one of us to pick up the book and amazingly the coin was gone. We all exclaimed,

"How did you do it?"

Note:

rather than 可用but not 来取代

wide awake 完全地清醒过来