听力原文：

G: Bill, when is National Day in the USA?

B: It's on July 4th. People usually have a day off.

G: What about National Day in China?

B: Our National Day is on October 1st. People have seven days off.

G: You are so lucky!

Question: When is National Day in the USA?

参考答案：

It's on July 4th.