老师对学生们说：“小朋友，下午校长要来问你们话，到时你们 要好好地回答。本杰
明，你是第一个，校长会问你是谁创造的？你答 是上帝创造的就对了，汤姆，你是第
二个，校长会问你世界上最初的 人是谁，你答是亚当和夏娃就对了。你们好好记着，
别答错了。                                                                                                                                                                      下午， 就在校长快要来的时候，本杰明因为肚子忽然痛得不能忍受，到厕
所 去了。                                                                                                                                                                       校长走进教室，看见第一个座位是空的，就问第二个的汤姆： “你是谁创
造的？” 。汤姆答：“亚当和夏娃。”  校长急了：“怎么？ 难道你不知道你是上帝创造
的吗？”                                                                                                                                                                   汤姆：“上帝创造的那个人，因 为肚子痛，到厕所去了。”
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        住在美国时，我在侨校教中文，学生中有不少正戴着牙箍接受牙 齿矫正。                                                                                                                                                                       有一次，我试着引发学生回答什么是“反哺”，就举例问道： “父母亲现在花很多钱替你们矫正
牙齿，将来父母亲老了，你们就花 钱替他们镶假牙，这种情况叫什么？”                                                                                                                                                                  学生们异口同声：“以牙还牙！”