1 conversation: 3-5 minutes between a man and a woman （5 questions）
1 lecture: 4-6 minutes of a professor delivering a speech by him- or herself （6 questions）
1 discussion lecture: 4-6 minutes of a professor interacting with students（6 questions）
一般听力材料是关于 Art, Life Science, Physical Science, Social Science
Art: architecture, city planning, cave/rock art, music history and theory, the history of photography, famous American and British authors
Life science: animal adaptation, animal behavior, animal communication, animal extinction, fish biology (how they move, mate, and eat)
Physical science: astronomy, atmosphere science, glaciers, oceanography, weather science, seismology (earthquakes)
Social science: anthropology, child development, the industrial revolution, urbanization
Main Idea, Detail, Choose 2 or 3 detail, Inference, Attitude, Purpose
Main Idea 的问题：
What does the lecture mainly discuss?
What is the main topic of the lecture?
What is the major source of meteoric water?
What are the two reasons the woman doesn’t feel safe?
Inference & Listen again 的问题：
What does the officer imply when he says this:
What does the professor imply about the importance of surface tension in water？
Tommy likes apples. Because he likes apples, he decided to go to the beach. When he was at the beach, he met his friend Billy.
Billy met Tommy because Tommy likes apples.
Attitude & Opinion 的问题：
What is the professor’s attitude toward those who take the existence of groundwater for granted?
What is the professor’s opinion about using pterosaur ancestors to learn more about pterosaurs themselves?
Purpose & Listen again 的问题：
Why does the professor mention the railroad industry’s intense competition and price wars?
Why does the professor mention New York City and Boston?