题目内容：

    William Lindesay has been interested in the Great Wall of China since seeing it in a school atlas（地图册）as a child in England. I vividly recall seeing in the " Oxford School Atlas" the Great Wall with its battlement symbol. From that moment, I had in my mind that when I grew up I'd go to China and walk along the Great Wall from end to end.

Lindesay's about 3 ,000-km solo run along the Great Wall began in 1987. Running the length of the wall was a brave expedition, venturing into sparsely populated regions where there was little chance of help if the runner had an accident. During another trip, Lindesay and his team ventured deep into the Gobi Desert of Mongolia. The explorers almost died from dehydration(脱水） . In total, Lindesay estimates in an interview that he has spent about 1,600 days of his life, or four full years, on the Great Wall in all seasons.

Lindesay and his wife, Wu Qi, whom he got to know and fell in love with during his trips in China, had a farmhouse at the foot of the wall. During his exploration, he noticed some sections of the wall were badly damaged and covered with litter. Modernization and development were making the situation even worse. "Some people say it will take generations to change; I say we don't have generations of time. It's got to be much quicker, " he said. Lindesay always carries a garbage bag with him in the wilderness, picking litter along the way. Lindesay uses a garbage bag as his calling card. The cloth bag bears a set of nine simple guidelines in Chinese, which calls on people to observe while traveling or camping outdoors : "Take your own garbage home" "Pick up? litter left by othersDon't damage plants or flowers, or pick fruit" and lots more.

1.What sparked William Lindesay's dream of exploring the Great Wall?

A.Seeing a movie about the Great Wall.

B.Experiencing a war for the Great Wall.

C.Surfing a website about the Great Wall.

D.Admiring the Great Wall in the school atlas.

2.What does the underlined word "sparsely" mean?

A.Remotely. B.Rarely.

C.Frequently. D.Largely.

3.What worsened the situation of the Great Wall?

A.The destroyed ecosystems. B.Waste caused by farms.

C.The increasing tourists. D.Modernization and development.

4.What sort of man was William Lindesay?

A.Strong - willed and selfless. B.Determined and grateful.

C.Warmhearted and impolite. D.Considerate and optimistic.