E
Rules are very important in our life. They are everywhere around us, at school, at home and on the road. Rules help us live and study in order. At school, we have class rules. We must listen to teachers carefully and keep quiet in class. We can't run or shout in the hallway. At home, family rules make us good kids. We need to finish our homework first and help do some housework. On the road, traffic rules keep us safe. We must walk on the sidewalk and wait for the green light. If everyone follows the rules, our life will be happy and safe. Following the rules is a good habit for every student. It teaches us to be polite and responsible.
阅读短文，回答下列问题。（21到24题每个题目的答案不超过5个词，25题不超过15个词）
21. What must we do carefully in class?

22. What do we need to do first at home?

23. Can we run in the school hallways?

24. What do traffic rules do for us?

25. Why is following the rules a good habit for students?

【解析】：我们可以在原文中定位对应内容得出答案：
21. 找到原文句子"We must listen to teachers carefully and keep quiet in class."，提取符合字数要求的对应信息即可；
22. 找到原文句子"We need to finish our homework first and help do some housework."，提取对应信息满足字数限制即可；
23. 找到原文句子"We can't run or shout in the hallway."，可直接得出否定回答；
24. 找到原文句子"traffic rules keep us safe."，提取对应内容符合字数要求即可；
25. 找到原文最后一句"It teaches us to be polite and responsible."，整理后符合不超过15词的要求即可。
【答案】：
21. Listen to teachers.
22. Finish our homework.
23. No, we can't.
24. Keep us safe.
25. Because it teaches us to be polite and responsible.