When was the Dragon Boat Festival celebrated as a public holiday in China?
举一反三
- The Dragon Boat Festival is a traditional holiday in China .
- Since （ ）, the Dragon Boat Festival has been celebrated as public holiday in China. A: 2006 B: 2007 C: 2008 D: 2009
- The Dragon Boat Festival is celebrated by boat races in the shape of dragons.
- Dragon Boat Festival is celebrated on May 5th.
- The Dragon Boat Festival is celebrated on the fifth day of May. ( )