2. 考研
  3. Salt, shells or metals are still used as money in out-the-way parts of the world today. Salt may seem rather a strange【C1】___

Salt, shells or metals are still used as money in out-the-way parts of the world today. Salt may seem rather a strange【C1】___

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问题    Salt, shells or metals are still used as money in out-the-way parts of the world today.
   Salt may seem rather a strange【C1】______to use as money, 【C2】______in countries where the food of the people is mainly vegetable, it is often an【C3】______necessity. Cakes of salt, stamped to show their【C4】______, were used as money in some countries until recent【C5】______, and cakes of salt【C6】______buy goods in Borneo and parts of Africa.
   Sea shells【C7】______as money at some time【C8】______another over the greater part of the Old World. These were【C9】______mainly from the beaches of the Maldives Islands in the Indian Ocean, and were traded to India and China. In Africa, shells were traded right across the【C10】______from East to West.
   Metal, valued by weight, 【C11】______coins in many parts of the world. Iron, in lumps, bars or rings, is still used in many countries【C12】______paper money. It can either be exchanged【C13】______goods, or made into tools, weapons, or ornaments. The early money of China, apart from shells, was of bronze, 【C14】______in flat, round pieces with a hole in the middle, called "cash". The【C15】______of these are between three thousand and four thousand years old—older than the earlist coins of the eastern Mediterranean.
   Nowadays, coins and notes have【C16】______nearly all the more picturesque【C17】______of money, and【C18】______in one or two of the more remote countries people still keep it for future use on ceremonial【C19】______such as weddings and funerals, examples of【C20】______money will soon be found only in museums.
【C7】
选项 A、had been used
B、are used
C、would be used
D、would have been used
答案A
解析 本题考查谓语动词的时态。sea shells被当作钱来使用是过去(at some time是过去时间)的事情，故A项had been used为正确答案。are used是一般现在时，不合适。would be used是过去将来时，would have been used是过去将来完成时，这两种时态要么用于虚拟语气，要么多用于间接引语中，这里均不合适。
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