填空题

Christmas is a day of fun, feasting and exchanging (11) People have been preparing for it for weeks. They have been cooking (12) foods, going to parties, and buying gifts. They have been decorating their houses in the two traditional (13) of Christmas: red and green. The most important Christmas decoration in many homes is a Christmas tree. It is an evergreen tree (14) lights, glass balls and shiny paper. The Christmas tree is a (15) of life in the darkest, coldest season in the northern part of the world.