【正文】
al. It first appeared around the 14th century in the courts (法庭) of the UK. It was used to (67) p the identity (身份) of certain people in court. Today, it is not used in the UK. But John Doe and Jane Doe are names used in courts in the US. They are used when the identity of a (68) p is unknown, or must not be revealed (泄漏).(69) H , in the UK, unknown people are called John Smith. This is because John has always been one of the most mon first names in English. And Smith is the most mon (70) f name.So, remember the Doe family. And next time when you forget someone’s name, you know who to say.