赞题库-背景图
单项选择题

The discovery of Dayao culture in Inner Mongolia, which has a history of ___ years, which is about the age of the Chinese ape man in Zhoukoudian, Beijing, proves that from antiquity Mongolians lived a primitive life and began to live in caves here.

A.200000-300000
B.500000-600000
C.600000-700000
D.700000-800000