— John, you ____ the computer game for two hours. It’s bad for your eyes. Stop, please!—OK, Mum. 

－Have you ever been to Shanghai? －Yes. I ______ there with my father last year.

My grandmother         a lot of changes in Tianjin since she came here.

--- ____________ you seen the 3-D film Titanic yet? --- Yes. I __________it a few days ago.

 I _______ the charity show on TV when the telephone rang.