根据以上内容，从下列五个选项中选择适当的句子还原到短文中，使短文完整与正确。 Everyone has a birthday, and most people's birthday aren't on the same day. But there is one special birthday for every Chinese. We celebrate it together. 1._____ It is our motherland's birthday -2._____ On October 1, 1949, Chairman Mao Zedong declared the founding of the People 's Republic of China in Tian'anmen Square. From then on, 3._____ There are many activities on that day all over China.4._____. Last year was China 's 60th birthday. The great National Day parade in Tian'anmen Square was exciting. We all were proud of our great country. This year China is 61 years old . 5._____ No matter what Plans you have, wish everyone happy National Day! A. National Day of China. B. Whose birthday is it? C. our National Day is on October1 every year. D. How are you going to spend your National Day? E. People can have a long holiday on National Day 1._____ 2._____ 3._____ 4._____ 5._____