【正确答案】topic As a family, we often go outside in the mountains on Christmas day. reason 1 In my opinion, the main reason is that, on Christmas day I can feel cold breeze and play in the snow with my family outside. It is so wonderful. reason 2 In addition, I enjoy skiing and making snowman with my family members. It is not only an entertainment, but also a way of doing exercise, especially with my family. Moreover, my brothers and sisters are really lazy during the winter break, therefore we like to do something active so that we can keep fit and healthy. conclusion Because of the reasons above, we prefer to get some fresh air in the mountains.