那是不久前的一个星期二，开完会后，已经过了静校时间大约半小时，我按惯例去班里检查值日情况。一上楼却发现教室的前门锁着，可后门半开着，屋里一片漆黑，却有阵阵的响声。我很奇怪，打开前门，拉开灯，只见张某和另一个学生在屋里。我有些生气，厉声问道：“这么晚了为什 It was on a recent Tuesday. After the meeting, it took about half an hour to go to the quiet school. I went to the class to check the day. As soon as I went upstairs, I found that the front door of the classroom was locked, but the back door was half open. The room was dark, but there were bursts of noise. I was surprised to open the front door and pull the light. I saw Zhang and another student in the room. I was a little angry and asked in a sharp voice: "What’s so late?