--Are you satisfied with the air today? --Not at all, it’s so foggy that I often get a cough. I think we all need much ________air to breathe.

 —______ do you surf the Internet?—About twice a week.

 — Did you watch the 52nd World Table Tennis Championships last night? — Yes, it was covered           , and it was exciting because our Chinese sports delegation(代表团) won the champion.

---What's the matter?--- I got hit ____ the face.

Simon lived in Beijing _________the years 2002-2004．