Passage 2Nobody can tell exactly why people first began to use salt, 11.but it is wellknown that salt has used in many different ways 12.throughout history. People who lived over 3000 years ago ate salted13.fish. In ancientEgypt, salt was used to preserve dying bodies. 14.Stealing salt were regarded as a serious crime in different 15.times. In the 18th century, for example, a person was 16.caught stealing salt, he was put into the prison. In the 17.RomanEmpire, one of the most important road was built 18.specially for salt to be carried from the mines to Rome. Guards were sent to protect the salt from stolen.19.The guards got their pay in salt,from which theEnglish word “salary” originateD、Any guard fell asleep 20.while on duty was said to be “not worth his salt”.This is still used today inEnglish.