根据句意及首字母补全在本课中出现的单词。
1. M_____ Christmas and Happy New Year!
2. Fish can't live w_____ water.
3. Let's d_____ our classroom before they come here.
4. Oh C_____ day,families open the presents they have give each other.
5. B_____ the way, how old are you?
6. There is a bird at the t_____ of the tree.