SECTION B PASSAGES Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow. 听力原文： Welcome to Everglade's National Park. The Everglade is a watery plain covered with saw-grass that's the home to numerous species of plants and wild life. And one and half million acres is too big to see it all today. But this tout will offer you a good sampling. Our tour bus will stop first at Tailor Slue. This is a good place to start because it is home to many of the plants and animals typically associated with the everglade. You'll see many exotic birds and of course a world famous alligators. Don't worry. There's a boardwalk that goes across the marsh, so you can look down at the animals in the water from a safe distance. The boardwalk is high enough to give you a great view of the saw grass prairie. From there we'll head at some other marshy and even jungle—like areas that feature wonderful tropical plant life. For those of you who'd like a close view of the saw grass prairie, you might consider running a canoe sometime during your visit here. However, don't do this unless you have a very good sense of direction and can negotiate your way through tall grass. We hate to have to come looking for you. You have a good fortune of being here in the winter, the best time of the year to visit. During the spring and summer the mosquitoes will just about to eat you alive. Right now, they are not so bothersome, but you'll soon want to use an insect repellent. What is the main purpose of the tour? A．To inform. visitors of the park's history. B．To provide an overview of the park's main attractions. C．To show visitors remote places in the park. D．To teach visitors how best to photograph wildlife.