英语翻译Jack is twelve.He studies in a middle school.He is in Gr

英语翻译
Jack is twelve.He studies in a middle school.He is in Grade One now.
But he doesn't like thinking,and he isn't good at his lessons.
One day,Tom,one of Jack's classmates,asks him,"Jack,my father and my mother have a son,but I have no brothers.Who is it?""I'm sorry,I don't know."Tom laughs and says,"Of course it's me."
In the middle of the day Jack gets home.He asks his mother,"Mum,you and my father have a son,but I have no brothers.Who is it?" His mother answers,"I don't know." Jack says happily,"Of course it's Tom."
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