-- Shirley, what were you doing at three o’clock yesterday? -- I was sitting by the window, __________ to the music.

---What are you busy____these days?----Nothig much

Qian Xuesen devoted all his life to ________________ China’s Space Program. 

I will watch TV rather than       this film.

--- Would you please ____  _ her _____    me back?--- All right, I will tell her.