听力音频：
Task1：
Eating Healthy Food Easier for today or for the past?
问题
Do you think that eating healthy food is easier or more difficult today than it was 40 or 50 years ago? Use examples and details to support your answer.
Task2:
Bicycle Borrowing Program
阅读材料
Bicycle Borrowing Program
It’s great that the university has a program where students can borrow bicycles from the gym. However, two changes would make the program more convenient. First, the borrowing period should be shortened to four hours maximum so that more bikes would be available when students want to borrow them. Second, currently, students who borrow bikes have to leave a cash deposit, which is returned to them when they return the bikes. But I think students should be required to leave their student identification cards instead, so they don’t have to remember to bring cash.
Sincerely,
Susan Lee
问题
The man expresses his opinion about the proposal described in the letter. Briefly summarize the proposal. Then state his opinion about the proposal and explain the reasons he gives for holding that opinion.
Task3：
Carrying Capacity
阅读材料
Carrying Capacity
An animal species needs to have enough resources, like food and water, to survive in any given environment. However, because resources are limited, only a certain number of animals of a particular species are able to survive in a given habitat. The greatest number a habitat can support is known as the carrying capacity. If nothing happens to disrupt or unbalance the relationship between the animal and its habitat, the carrying capacity will remain stable. However, a carrying capacity is not fixed. If there is a significant disruption, such as an environmental event that alters the amount of available resources in the habitat, the carrying capacity will change
问题
Explain the concept of carrying capacity, using the example of the moths and ragwort.
Task4:
Advantages of Franchising
问题
Using the professor’s example of the pizza restaurant, explain two advantages of franchising.
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