题目

改错：(2020·陕西省部分学校第一学期摸底检测)As students, we mustn't study hard so as to serve our society and our nation in the future. ________________________________________________________________________ 答案：mustn't→must　根据语境和常识可知，此处应该是“我们必须要努力学习”，故将mustn't改为must。

查看本题答案和解析