上午第四节是我的数学课。刚上课不多时,天空中乌云密布,随着是一阵狂风,雨就如瓢泼一般下起来。学生的注意力开始不集中了,有的同学显得很兴奋;而有的则是一副忧心忡忡的样子,他们中有的是走读生,这雨来得太突然,他们可都没有带雨具呀,回家就成了问题。这时,透过教室的窗户,我发现有 The fourth quarter in the morning is my math class. When there was not much in class, the sky was full of clouds. With a gust of wind, the rain began to pour. The students’ attention began to be distracted. Some students seemed very excited. Some were worried. Some of them were day students. The rain came too suddenly. They did not bring rain gear. They went home. It became a problem. At this time, through the windows of the classroom, I discovered that