根据下列材料请回答 69~72 题:
第 69 题 The purpose of the text is___.
A.to show research done by today’s scientists
B.to describe life of the Stone Age
C.to tell about the early farming
D.to introduce an ancient site
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!