阅读下面材料，在空白处填入适当的内容（一个词）或括号内单词的正确形式。
Mr. Smith has been in prison for three years, which may have you think he is not a good man. But____a matter of fact, he was kind-hearted as well as honest. The reason_____he was put into prison was that his six-year-old son blew up（爆炸）the bridge near his home, ______(imitate) what he had seen on TV. ______this little boy broke the law, he was too young to be put in prison.  According to___local law, the boy’s parents had to be punished. As a result, Mr. Smith received the punishment. He_______(arrest)and taken to the police station finally. Most of the people in the town showed pity on him, but it was________ (use). After all, law is law. Everybody is to obey______. What’s _____ (bad), Mrs. Smith was out of work before long. Misfortunes tell us what fortune is. _____the Smiths have experienced does teach us a good lesson.