填空题
Scientists believed that Mayan city ______ because many buildings were left unfinished.
【参考答案】
had been abandoned
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填空题
The reason why people in the past believed that the ordinary Mayan people lived in the countryside was that their knowledge was based on______.
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填空题
Though much remains to be discovered, by putting together various findings obtained since the 1700s, researchers have come to the conclusion that Mayan culture is quite remarkable.
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