听力内容： 来自中国的雇员dana跟同事charlie聊天儿，说自己要去美国朋友家过圣诞节，请charlie给她讲讲美国人过圣诞的习俗。 d: would you say christmas is the most popular american holiday? c: definitely. it's a really big deal. most people don't work on that day, and if you ask someone to work you have to pay them a lot of overtime. d: should i bring presents for all of his family members?
