Question

[Nhân's Nguyễn's]

An American professor who has studied the Mayas................. come up..............a new theory about the sudden end of their empire.According to Professor Richard Hansen, an archaeologist......... the University of California; the collapse of the Mayan.......... in Central America was.......... about by the Mayas................

Their object was to display their wealth and power by making their building and decorations as beautiful as possible.This involved using large quantities of lime, which they put..................the walls to make them smooth. Unfortunately, the creation of lime is a precess which requires intense heat, and they........ had to cut down huge numbers............ trees. This affected the quality of the soil, and it....................almost impossible to farm

Answer 1

[Nguyen Mai Anh]

An American professor who has studied the Mayas.........HAS........ come up........WITH.....a new theory about the sudden end of their empire.According to Professor Richard Hansen, an archaeologist....AT..... the University of California; the collapse of the Mayan.......CIVILIZATION... in Central America was.....BROUGHT..... about by the Mayas....THEMSELVES............

Their object was to display their wealth and power by making their building and decorations 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 precess 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