用括号内所给单词的适当形式填空。（5分）

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

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

小题3:Smoking can bring us many kinds of _______ (ill).

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

小题5:He did his homework all by _______ (him) yesterday.

生产价格：是指商品的生产成本加平均利润。据此定义，生产价格的变动最终取决于( )

A．平均利润的变动

B．成本价格的变动

C．商品价值的变动

D．商品价格的变动