“耶,我成功了!”“我也成功了!”教室里不时传来阵阵欢呼声。原来,同学们正在孙老师的指导下开心地做实验。今天上午第三节课是科学课,是同学们期待已久的课。上课铃打响后,同学们一边耐心地等待着孙老师的到来,一边在心中默默祈祷:千万不要有人来调课。在急切的等待中,我们终于把孙老师给盼来了。只见他满脸笑容,一副很神秘的 “Yeah, I succeeded! ” “I also succeeded! ” Cheers from time to time in the classroom. It turned out that students are happy to experiment under the guidance of Sun. The third lesson of this morning is a science lesson, a long-awaited lesson for our students. After the bell rang, the classmates waited patiently for the arrival of Dr. Sun while quietly praying in their hearts: Do not have someone come to class. In the eagerness of waiting, we finally gave hope to Sun. I saw him smiling, a very mysterious