听力音频：
Task1：
Some people like to shop in large grocery stores and department stores. Other people prefer to shop in small specialty stores or shops. Which do you prefer? Explain why.
Task2：
The man expresses his opinion about the letter-writer’s proposal. Briefly summarize the proposal. Then state the man’s opinion and explain the reasons he gives for holding that opinion.
An Art Museum at the University?
Many universities have their own art museums, with collections of paintings and sculptures by well-known artists. I think our university should create a similar museum on our own campus. Such a museum would give our students an opportunity to learn to appreciate high-quality fine art. It would be a great way for us to see artworks that we might not have access to otherwise. In order to pay for the museum, the university could write letters to alumni asking them to donate money to help build the museum. I’m sure that many former students love art and would be glad to donate money to help the university build a museum here.
Sincerely
Diane Miller
Task3：
Using the example from the lecture, explain the concept of optimal foraging.
Optimal Foraging
Food provides animals with the energy they need to survive. However, animals also lose energy in the process of obtaining, or foraging, for food. Therefore, in order to conserve energy, many animals behave in ways that minimize the energy they expend in the foraging process while at the same time maximizing their nutritional benefits. This energy-efficient approach to obtaining food is known as optimal foraging. The practice of optimal foraging allows animals to expend the least possible amount of energy while at the same time obtaining prey with high food value that will provide them with necessary nutrients.
Task4：
Using the points and examples from the lecture, explain two ways that advertising can negatively affect the environment.
