用所给单词的适当形式填空。

1. My aunt's son speaks _____ (China) very well.    

2. It's Monday. My uncle is _____ (real) busy today.    

3. These kids usually have three _____ (class) in the morning.    

4. It is Tuesday, December _____ (ten).    

5. His grandfather is a great _____ (music).