哎,我一边检查一边嘀咕:“难道是老师改错了?但是做题很粗心, i thought i got 100 points, "teacher,可当老师发下试卷后,于是,解题趣事,咦, i realized that i had taken "jia" as "cheng",以后可要更加细心了,我就是没看出来,我拿着试卷跑到老师面前, i muttered,微笑着说:“你再看看运算符号,有一次考试, i m careless. we should be more careful in the future. i