Read the text below and decide which answer best fits the gap. An American professor who studied the Mayas has
Read the text below and decide which answer best fits the gap.
An American professor who studied the Mayas has (1)_______ a new theory about the sudden end of their empire. (2)_______ to Professor Richard Hansen , an archaeologist at the University of California , (3)_______ of the Mayan civilization in central American was (4)_______ about by the Mayas themselves .
Their object was to display their (5)_______ and power by making their buildings and decoration as beautiful as possible. This involved using large quantities of lime , which they put on the walls to make them smooth. Unfortunately, the creation of lime is a process which requires intense heat, and they therefore had to cut down huge numbers of trees . This affected the quality of the soil , and it became almost impossible to farm.
Professor Hansen , who has just returned from an excavation in the El Mirador region of northern Guatemala , (6)_______ a meeting of archaeologists in Philadelphia that the Mayas , having made this mistake in the 3rd century , repeated it 600 years later, at which time it proved fatal. Increasing food (7)_______ among the Mayas created a Central American equivalent of the Peloponnesian War which ravaged (8)_______ Greece . However, unlike the Greek civil war, which only (9)_______ for 27 years , the Mayas wars went on for many centuries and left many of their great cities and temples in (10)_______.
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