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.