W: Yellow Stone? I ve always wanted to spend sometime out Wyoming.
M: Wait till you here what the project is. She is working with the buffalo population. Their herds have been increasing in size lately which is good in theory.
W: Yeah. but I thought they were in danger of becoming extinct.
M: Well, apparently because of all the winter tourists, paths are created in the snow. More buffalo are surviving the harsh winters because the paths make it easier for the buffalo to move around and find food. But it turns out that some of the herds are infected with bacteria.
W: Oh, yeah. I heard about that A blue...
M: A blue seller aborters.
W: Right, It has been around for quite a while.
M: Yes, it has. And because the buffalo population is increasing, they have been roaming more than usual. And the diseases began to spread to the cattle ranches that border the park.
W: That s bad news. Isn t that the disease that causes animals to abort their young?
M: Yes. And it caused a lot of controversy. Some of the ranches even want to destroy the buffalo herds.
W: That s awful. Have they made much progress with the research?
M: So far they have been collecting tissue samples from dead buffalo to see if bacteria is present.
W: I d really be interested in working on this. You know I ve been researching diseased animal population.
M: That s why I thought of you. I took the liberty of mentioning your name to my friend. She s hoping you ll be able to spend the whole summer out there.
W: Well, I was going to work on my thesis a lot in July, but I m sure my advisor wouldn t want me to pass up this opportunity.
35. What did the professor want to talk to Ann about?
36. According to the professor, why is the buffalo population increasing?
37. Why does the professor think Ann would be interested in going to Yellow Stone?
38. How will Ann probably spend the summer?

Part C
Question 39-41 Listen to a talk given by a tour guide. ª¥
Welcome to Everglade National Park. The Everglade is a watery plain covered with saw grass that s home to numerous species of plants and wild life. And one and a half million acre is too big to see it all today, but this tour 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 plants and animals typically associated with The Everglade. You will see many exotic birds and of course the world famous alligators. Don t worry there s a border walk that goes across the marsh so you can look down at the animals in the water from a safe distance. The border walk is high enough to give you a great view of saw grass quarry. From there we ll head for some other marshy and even jungle-like areas that feature wonderful tropical plant life. For those of you who d like a closer view of saw grass quarry, 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 all grass. We hate to have to come looking for you. You have a good fortune of being here in winter, the best time of the year to visit. During the spring and summer, the mosquitoes were just about to eat you alive. Right now they are not so bothersome but you will still want to use insect repellent.
39. What s the main purpose of the tour?
40. What does the speaker imply about paddling across the water in the canoe?
41. Why is it good to visit the Everglades in the winter?

Questions 42 through 46 Listen to a talk given by an astronaut. ª¥

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