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.