催　单 　　我是一家兽医站的技师。当动物到了该注射疫苗的时候，我们就寄出催单。一条德国物质牧羊犬布鲁诺来做每年一次的狂犬疫苗注射。我们依照州法律的要求询问他的主人，在过去的十天里布鲁诺是否咬了什么人。「噢，是的。事实上这正是我们到这儿来的原因，」她回答说。我觉得奇怪，告诉她我们以为他们是因为收到了我们的催单才来的。 　　「的确如此，」她解释道。「布鲁诺咬了给你们送催单的邮递员。」

Reminder In the veterinary office where I'm a technician, we mail out reminders when pets are due for vaccinations. Bruno, a German shepherd, arrived for his annual rabies shot, and we were required by state law to ask his owner if Bruno had bitten anyone in the last ten days. "Oh yes, in fact that's why we're here," she replied. Surprised, I told her we assumed they'd come in because of our reminder. "We did," she explained. "Bruno bit the mail carrier who was delivering your card."