About 10,000 enthusiasts took part in the 2013 Sports Lottery New Year Climbing ________ on Tuesday at the Beijing Badaling section of the Great Wall.

A．incident

B．accident

C．event

D．affair

—I drove to Zhuhai for the air show last week.

—Is that__________you had a few days off? 

A．why

B．what

C．when

D．where