题目内容：

用括号内所给单词的适当形式填空。（5分）

1.The baby is very young. He has no _______ (tooth) now.

2.Yang Liwei is one of the _______ (hero) in my heart.

3.When the students heard the news,they were all _____.(excite)

4.He spends two hours _______ (exercise) every day.

5.I often see him  _______ (dance).