听对话，选择合适的单词，将对话补充完整。将字母标号写在相应的横线上。
A. U.S.A.  B. Labour  C. holiday  D. Monday
A. U.S.A.  B. Labour  C. holiday  D. Monday
Guoguo: May Day is coming.
Mike: Is it a 1.__________?
Guoguo: Yes. In China, we also call it 2.__________Day. It’s on May 1st.
Mike: But in the 3.__________, Labour Day is the first 4.__________ of September.