精聽建議：

先完整地把一條新聞聽一到三遍，爭取掌握大意。然后，一句一句精聽，力爭每句話都聽明白。遇到實在不懂的地方，再聽寫。

下面的文本材料中空缺部分里面要填的詞都很簡單，不過是一些值得注意的連讀或者典型的美式發音哦，有些語速比較快。試試看，你能不能全部寫對？

（參考文本，歡迎指出錯誤^^）

Lesson50 Yellowstone National Park

A national park is a large piece of land where animals are free to come and go. Trees and plants grow everywhere. People go to a national park to enjoy nature. Many people stay in 1 in national parks. They sleep in tents and cook their food over 2 . They also walk on trails or paths in the parks. On a gate at the entrance of Yellowstone, a sign says,“For the Benefit and Enjoyment of the People.”
Yellowstone is the world's oldest national park. It became a national park in 1872. It is also the world's largest park. It covers parts of the states of Wyoming, Montana, and Idaho. Yellowstone is 3 times the size of the smallest state, Rhode Island.
Yellowstone 4 its geysers. These holes in the ground shoot hot water into the air. There are about seventy geysers in the park. The most famous is Old Faithful. About every hour Old Faithful shoots hot water hundreds of feet into the air.Two-and-a-half million people visit this beautiful park each year. Park rangers give information to visitors. They also 5 the park. They tell visitors not to pick the flowers. They also tell them not to feed or hunt the animals.

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