中国大学MOOC: The westerners take _____________tricolor as the Christmas colors.
举一反三
- The three colors that cannot be made by mixing any other colors are called____ colors.
- The traditional colors of Christmas are ______.
- what are the Christmas' colors?
- What are the traditional colors of Christmas?
- Sunlight is composed of seven colors,_______________________(世界也是) full of different colors.