题目

阅读理解 Lost cities that have been found The White City In 2015, a team of explorers to Honduras in search of “the Lost City of the Monkey God” led to the discovery of the White City. They found the ruins in the Mosquitia region of the Central American country — which is known for poisonous snakes, vicious jaguars and deadly insects. It is believed that local people hid here when the Spanish conquerors(征服者)occupied their homeland in the 16th century. Canopus and Heracleion Modern researchers were teased by the ancient writings about the Egyptian cities Canopus and Heracleion 人患龋齿，感到疼痛时，说明龋洞已深达牙齿的A. 牙釉质 B. 牙本质 C. 牙根 D. 牙髓腔