【复习引入】
阅读理解。阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。
There is a nineyearold kid sitting at his desk and suddenly，there is a puddle (水坑) between his feet and the front of his trousers are wet.He thinks his heart is going to stop because he cannot possibly imagine how this has happened.It’s never happened
