听力音频：
Task1：
To Write a Long Report or Give a Speech?
问题
If you were given the choice of a school or work assignment, would you prefer to write a long report or give a speech in front of a large group of people? Use details and examples to explain your choice.
Task2:
Start a Ride-sharing Program
阅读材料
Start a Ride-sharing Program
Students who live off-campus often get to campus by car. I propose that the university create a student ride-sharing program, where students who live in the same area would form groups of four with each group driving to campus together in one car. The ride-sharing program would benefit students as well as the environment. For the students, they would save money by driving to campus in groups instead of separately. And since there would be fewer cars going and coming from campus, there would be a positive impact on the environment.
Sincerely,
Jim Sears
问题
The woman expresses her opinion about the proposal in the letter. Briefly summarize the proposal. Then state her opinion about the proposal and explain the reasons she gives for holding that opinion.
Task3：
Signaling
阅读材料
Signaling
Customers are often willing to pay higher prices for high-quality products; however, without specialized knowledge, it can be difficult to evaluate whether certain items are high quality. When customers are unsure whether an item is high quality, and worth the price, they are less likely to purchase it. This problem can be resolved through signaling. The seller of a product finds a way to signal, or demonstrate, to the buyer that the product is high quality. One common signaling strategy is to have a person or company that is not involved in the sale provide an objective, unbiased judgment about the quality of a product.
问题
Explain how the example used in the lecture illustrates the concept of signaling.
Task4:
Move Around in a Mountainous Environment
问题
Using the examples of the mountain goat and bighorn sheep, explain two special features that help animals move around in a mountainous environment.
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