I guess Peter and his sister enjoyed __________ at the dancing party. .

单项选择（每题1分）Is this the reason _____ she explained in the report for her success in the job?

Nobody in our class but Tom and I ___ that our monitor is going abroad for further education.

Good health is __________ most people take for granted— until they lose it .

When did the great earthquake in Wenchuan happen ?—It happened __________14:28 __________the afternoon of May 12, 2008