题目内容：
阅读下面的对话，根据其内容写一篇有关长城的说明文。 要求：
1.所写短文应与对话相关内容意义相符，涵盖其要点。
2.用你自己的语言来表达，可以改写对话中的句子，但不可以照抄原句。
注意：词数80词左右。
Bruce：Is this your first time to come and visit China?
Cindy：Not really，1 went to Shanghai in 2010，but I didn’t have much time to do sightseeing.So1 would really like to take this opportunity and take a look around the cap。
ital city of China.
Bruce：You should do that.Where are you planning to go tomorrow?
Cindy：A friend is taking me to see the Great Wail.Is it far from Beijing?
Bruce：About an hour’s drive to the west of Beijing.The part you are going to see iscalled Badaling，a small part of the original wall.
Cindy：Since it’s called the Great Wall，it must be very long then.
Bruce：It’s over 13，000 miles long，but some parts are now in ruins or have disappeared.
Cindy：Why?
Bruce：After all，some of it was almost 2000 thousand years old.Its construction started inthe Spring and Autumn Period.Its main purpose was for military defense-to fend
off foreign invaders.
Cindy：Wow，that’s amazing.No wonder people call it“the eighth wonder of the world”.
Bruce：The great wall that tourists see today was actually built in the Ming Dynasty，afterwhich no new walls were built.
Cindy：Now I’m really looking forward to see it.
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