Once there was a king and his daughter. The king asked his daughter how much she loved him. She said that she loved him as much as the loved 1. Her answer made the king very happy. Salt is simple thing, 2 it is very important. So the king thought his daughter cared a lot about him.
Salt has many3. Bodies need salt. If we don't have enough, our bodies can't work properly. We put salt on icy roads to make them 4. We also use salt to produce other products, like paper and glass. But for many years, salt's most important job was to 5 food. Like other living things, most bacteria(细菌) need water to live. Salt takes in plenty of water, so most bacteria(细菌) can not live 6a salty environment. As a result, salt protects food and many other things. For much of humans history, this ability has made salt 7. Every ancient culture from Egypt to China depended on salt. Even today, the hard working useful people are 8 as “the salt of the earth”.
For centuries, salt was also hard to 9. It's usefulness, together with rarity(稀有) made it very expensive. Salt could even be used like 10. In fact, the word salary (薪水) comes from the word salt.
Today, salt is used more widely and it still plays an important role in our life.
