GMAT
Unlike other Mayan cities, Cancun seems to have used its strategic position at the foot of the highlands, a source of jade, obsidian, and other valuable commodities, to become a commercial power throughout the lowlands.
Unlike other Mayan cities, the commercial power of Cancun throughout the lowlands seemed to have come from using its strategic position at the foot of the highlands, a source of jade, obsidian, and other valuable commodities.
题目基本信息