1. 你的外国朋友Tony想到长城去旅游，向你询问长城的—些情况。请根据下表的信息向他做个介绍，90词左右。

History	Over 2,000 years, built in Qin Dynasty
Place	In the north of China
Length	21,196 kilometres
Height	7.8 metres
Width	6.5 metres at the base, 5.8 metres at the top