解析：A　细节理解题。由BUSES 部分的be waiting at Fenton to take walkers back to Weldown以及文中所给路线图可知，十公里走和二十公里走的路线均是从Weldown出发，在Fenton结束。

　　B

　　Imagine walking through the park on a sunny day. You look up to see a spider twice the size of your head. It looks so real that it seems to be moving down its web toward you.

　　Before you scream and run away, look closer. That 50­pound spider is a wood sculpture, made by artist David Rogers. It is one of 14 bugs(虫子) David has on display in parks and gardens around the United States.

　　David's collection is called Big Bugs. It includes three monster ants. Each one is 25 feet long. That's almost as long as a school bus! Some of David's other bugs are all big enough to sit on.

　　David hopes his huge sculptures will help us to stop and notice bugs. We may not see them working. Sometimes we may not even want them around. But David points out that bugs are an important part of nature. They make the soil a better place for plants to grow, they pollinate (对......授 粉) flowers, they eat other insects, and they are food to many creatures.

　　As a child, David did not get the best grades. He was not even the best painter. But he loved to make things. Using only sticks and string(绳), he would build tiny villages small enough for an insect.One day when he was older, he saw a bent tree that reminded him of the backbone of an animal. He decided to form a giant beast by adding more branches. The result was a dinosaur named Goliath, his first large sculpture. David has also made sculptures by welding (焊接) metal. By joining together old car parts, he made a housefly and a dragonfly.

Does this sound like fun to you? Good news-David believes there's an artist in everyone. Of course, you probably won't start out by making a 25­foot ant. It took