听力音频：
Task1：
Do you agree or disagree with the following statement?
It is important for children to learn to draw or paint.
Use details and examples to explain your opinion
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.
Students Need Campus Snack Shop
I think the university should open a snack shop on campus-a snack shop that would be operated entirely by our students. A student-run snack shop would benefit students in two ways. First, it would create a number of job opportunities for students Second, the store would be a convenient place on campus to buy food, providing students with a fast； easy place to get snacks at any time of the day
Sincerely, Julia Wilson
Task3：
Explain how the example of leaf-cutter ants illustrates the concept of task partitioning
Task Partitioning
Different species of insects have different ways of organizing the essential tasks that need to be completed in order for them to survive. One way of accomplishing this process is through task partitioning. Insect groups that use this method divide, or partition, their work into several different stages that are ordered and performed in a fixed sequence by different groups of workers. An important benefit of this technique is increased efficiency, since the workers performing each task are specialized, which saves time and energy
Task4：
Using the examples from the lecture, explain two ways the railroad system changed business in the United States
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