练习二：完成对话 (Exercise 2: Complete the Dialogue)
根据课文内容，选择最合适的词语填空。Choose the best word to complete the dialogues based on the text.
1. 学生们：老师，______ 好！
A. 你 (nǐ)
B. 您 (nín)
C. 你们 (nǐmen)
解析 (Explanation): "您" is the honorific form of "you", used to address elders or teachers to show respect.
2. 学生们：谢谢！ 小语：______！
A. 不客气 (bú kèqi)
B. 大家 (dàjiā)
C. 再见 (zàijiàn)
解析 (Explanation): The standard polite response to "谢谢" (Thank you) is "不客气" (You're welcome).
3. 王一飞：______，再见！ 学生们：老师，再见！
A. 你们 (nǐmen)
B. 学生 (xuéshēng)
C. 同学们 (tóngxuémen)
解析 (Explanation): A teacher addresses the class as "同学们" (Classmates/Students). Adding "们" makes it plural.