根据句意及汉语提示完成单词。

1. Peter is from New York and he's ____ (美国人).

2. Yang Liwei's ____ name (名) is Liwei.

3. My teacher is writing on the ____ (黑板).

4. There are ____ (五十) students in my class.

5. Ma Lin plays table tennis very well. He is ____ (二十九) years old.