2009年高考英语二轮复习专项限时训练•阅读理解（四十二）（附答案与解析）

Millions of people visit Yosemite National Park every year to see the tall waterfalls and mountains. These mountains are a splendid sight when viewed form the valley floor. Lots of stores, hotels, and restaurants are needed to handle the crowds. Also, water, roads, and other service systems are part of the infrastructure (基础设施) that must be maintained.

Unfortunately, these systems are starting to break down. It’s not just in Yosemite but in national parks around the nation.   

Yosemite is thirty years old according to Dennis Galvin, a National Park Service worker. The Park is not only old but worn out. Two or three times as many visitors come every year. That is too many visitors for the park to deal with.

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