.Playing with a cell phone, he suddenly ________ the teacher staring at him.
Was it _____ he was playing volleyball on the playground _____ he got hurt?
You can’t imagine what great difficulty I had _______ a ticket for Jay Chou’s concert in Zhengzhou.
---See you next Friday. --- Next Friday? Why, what ________ that day?
His new novel is ________his own experience when he was studying in Harvard University.
— What do you think of the film Inception (盗梦空间)? — Just so-so. I don’t think it worth ______ a second time.