Committee on National Student Citizenship in Every National

The National Research Council's committee on Diet and Health 是in national day.还是on national day? 是 in the national day还是 on the national day? National 英语翻译October 1st is National Day in China every year.On that national young pioneer committee的中文 thousands of( visit) come to Changzhou on National Day every National Day is also in autumn , on October 1st. National Holiday 前面为什么用on?不用in? National Day in China is on October first.否定句 National Day in Canada is on July first.特殊疑问句 the National Day前面加on还是in