On August 31, the 23-year-old Liu Xiang won the 110-meter Hurdles finals in the World Athletics Championships(田径世锦赛男子110米栏决赛) in Osaka. No one can___him in hurdles, I dare say.
Only ______ a human being.
---Why didn’t you tell me the truth about his illness? ---___________, I knew nothing about it at that time.
---I am afraid that I have to trouble you with this question. ---___________.
--How long are you staying ? -- I don’t know . ______.
The Olympic Games are held _____.