２６．文章修改。（１５分）———从揩黑板谈起①一个班级发生了这么一件事：②一天，上课铃响了。老师就要来上课了。可是，黑板还没有人揩。大家你看着我，我看着你，谁也没有敢上前去。（A）这时，一个同学在众目睽睽之下，铤而走险地上去很快将黑板揩干净了。当时，（B） 26. Article modification. (15 points)——————————————————————————————————————————————————————————————————————————————————————————————————————————— The teacher will come to class. However, no one has yet seen the blackboard. Everyone you look at me, I look at you, no one dares to go up. (A) At this time, one of the classmates, under the watchful eye, took risks and quickly cleared the blackboard. At that time, (B)