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威学教育|专注雅思、托福等出国考试培训 网址：www.weixue100.com

托福口语TPO48综合体听力文本

TPO48

Tpo48 Task3

Listen to two students discussing the letter. Did you see this letter?

Yeah. It's a nice idea, but it'll never happen. Why do you say that?

Well, first of all, you can get on a bus right here on campus and in half an hour, you are downtown at the county art museum. That's true.

And if you show you student ID card, it only costs like two bucks to get in. Yeah. In fact, on Mondays, students get in for free.

Right. And you can see some of the greatest art in the world there. For example, you know Rembrandt, the famous Dutch painter? Yeah.

Well, right now they're showing something like twenty of his paintings Wow.

Yeah. And you know, it's true. We do have a lot of very generous alumni. But we're already asking

them for help building a new student center and a new library. And those are both very expensive projects. Yeah. That's right.

So I don't think we can expect them to donate much money for anything else anytime soon, especially for something we don't really need. Task4

威学教育|专注雅思、托福等出国考试培训 网址：www.weixue100.com

Optimal Foraging

Now listen to part of a lecture from a biology class. All right. So I've got a good example of this.

There's a bird, a species of crow, that lives near the water and it feeds on a type of shellfish that

has a hard outer shell. In order to eat the shellfish, the bird has to crack open its hard shell. So

when this bird feeds, what it does is: it dives down out of the air into shallow water, grabs a

shellfish in its mouth, then carries the shellfish up in the air. It then drops the shellfish, lets it fall

onto the rocks below. When the shellfish hits the rocks, its shell cracks and splits open and the

bird can eat it.

Now, this bird, this crow, doesn't just swoop down, grab the first shellfish it sees and then fly up

to any height and let it fall. Instead, it does two things.

First, it carefully selects only the biggest shellfish. That means it's going to get the biggest possible meal for its efforts. Okay?

Second, it carries the shellfish up to a specific height, about five meters, and drops it from there.

If the bird dropped the shellfish from a lower height, it would have to pick it up and drop it too

many times in order to break the shell. On the other hand, if the bird carried the shellfish up to a

higher altitude, an altitude higher than it's necessary to crack the shell, it would be wasting energy. So this bird expends just the right amount of energy-no more no less-that it needs to

obtain just the right kind of food. Task5

威学教育|专注雅思、托福等出国考试培训 网址：www.weixue100.com

Listen to a conversation between two students.

Hey. Cindy. You look happy. Making plans for the summer vacation?

I'm just glad the semester is finally over. I just finished my final exam, so I'm taking off for

summer vacation tomorrow. Aren't you? I wish.

What do you mean?

I have to rewrite the lab report for my biology class. I guess I did it all wrong. So the professor's

making me rewrite it before he'll submit a final grade.

I guess that's better than if he just gave you a bad grade on it, right?

I guess so. But I was planning on leaving town tomorrow too, and now I'm not sure I can. I spoke

with the professor and he gave me two options. I can either turn in the revised report in one

week and get my grade, or he said I can wait, you know, taking incomplete in the class and submit

the paper next semester in the fall.

So are you going to stay around to revise the report?

I could. I'd get the grade for the class on time and I wouldn't have to think about it anymore. But

there's a family reunion this weekend. I was really looking forward to it. IfI stay around to revise

the report, I'll miss the reunion.

Well, maybe you should take your time and work on the report over the summer. You can submit it when you return in the fall semester and get your grade then.

That would be fine, but what if I need materials from the library to revise the report? I don't

know if I’II be able to find the materials at the library at home.