Olives and olive oil became valuable trade items between societies and civilizations.People who moved from one place to another and traders from the Fertile Crescent introduced olive oil to Syria and Crete，which spread to Egypt，Greece，and Rome.It continued to migrate westward until olive trees were first introduced to California between 1769 and 1785.

　　The olive tree and olive oil have important symbolism in each religion.In Christianity，a dove(鸽子)brought an olive branch to Noah as a symbol of peace and new life after God flooded the Earth.The Prophet Muhammad suggested the use of olive oil for medicinal(药用的)purposes and massage(按摩)．

　　Olive oil has medicinal benefits.Olive oil has been used for health benefits.Regular eating olive oil can reduce the risk of cancers. It was used during the Spanish Civil War from 1808 to 1813 to treat cases of fever.In 1960，oleuropein(橄榄多酚)was removed from olive leaves，which helps with food poisoning.

　　本文主要讲述了橄榄树的起源以及医药用途。

　　5．If an olive tree is chopped to the ground，______.

　　A．it can’t grow any more

　　B．it can produce more new ones

　　C．there is no doubt that it will die

　　D．it is able to grow back strongly

　　解析：细节理解题。根据第一段An olive tree can have a life of 500 years and is strong enough to continue to grow if ever chopped to the ground可知，橄榄树能活500年，而且很顽强。即使被砍，只留下根部，也会活过来。

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