题目内容：

William Lindesay, a British traveler and writer, has been exploring the Great Wall—one of the human's most wonderful building projects. Not even a Chinese knows the Great Wall of China as well as he does.

When, as a schoolboy, Lindesay announced his plan to explore the Great Wall, nobody took him seriously. But Lindesay achieved his goal, by spending 25 years on the Great Wall and has become one of the world's most famous experts on its rich history. Lindesay now lives and works in Beijing. This year his new book has come out, The Great Wall Explained, with a lot of photographs and articles.

Running on the Great Wall was a brave trip and Lindesay had already run 3，000 kilometers along it! During those years, he got to many villages along the way. He  was  often  helped  by  friendly  villagers,  although  they  didn't  quite  understand  why  the  Englishman  would  have  such  interest  in  the  Great  Wall.

1.Who is William Lindesay?

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2.How long did Lindesay spend on the Great Wall?

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3.What's the name of his new book about the Great Wall?

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4.把短文第三自然段中画线句子翻译成汉语。

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5.给短文拟一个恰当的标题。

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