基于教材前言改错 · 12 道选择题 · 点选项即时判分，理由只在解析里给出
原句：Dear classmates, welcome to use this set textbook, wish it can become a good assistant you learned. Before begin learning, we want to have a communication for problem in math learning with you.
仅改语法的最小版：Dear classmates, welcome to this set of textbooks. We hope it will become a good assistant in your learning. Before you begin, we would like to communicate with you about the problems you have in learning math.
母语者推荐版：Dear students, welcome to this textbook series. We hope it will be a helpful companion as you learn. Before you dive in, we'd love to hear about the problems you've run into in math.