Answer the following question: Why does the narrator take discrimination more personally than his classmates do？

Listen again to part of the conversation．Then answer the question. Why does the professor say this:

A．He is thinking about what he will say in the recommendation.

B．He wants to know the student's opinion of his psychology class.

C．He needs the student's help in solving a difficult problem.

D．He would like to try something that he has never done before.

Listen again to part of the conversation．Then answer the question. Why does the professor ask this:

A．To learn about the student's opinions

B．To suggest possible research topics

C．To give examples of poll questions

D．To describe a survey that she wrote

Listen again to part of the conversation．Then answer the question. Why does the woman say this:

A．To request that the man speak more softly

B．To express her dislike of thermodynamics

C．To agree that lack of time is a problem

D．To inform. the man that she needs to leave

Listen again to part of the conversation. Then answer the question. Why does the man say this:

A．To show disappointment that the classes are full

B．To express hope that the workshop will help him

C．To state that the classes sound interesting

D．To express pleasure that the workshops are free

Listen again to part of the conversation. Then answer the question. Why does the man say this:

A．To inform. the woman that no rooms are available

B．To encourage the woman to reserve a room now

C．To recommend the rooms on the third floor

D．To let the woman know which rooms are better

Listen again to part of the lecture. Then answer the question. Why does the professor say this:

A．To explain why it snows frequently in the mountains

B．To show why mountain scenery attracts many visitors

C．To describe conditions that lead to glacier formation

D．To compare mountain glaciers with Arctic ice sheets

Listen again to part of the talk．Then answer the question． Why does the professor mention her former students?

A．To introduce basic skills that all chemists need

B．To make the study of chemistry more exciting

C．To give examples of successful graduates

D．To recommend former students as tutors

Listen again to part of the lecture．Then answer the question. Why does the professor say this:

A．To explain why she doesn"t like apples

B．To describe a common disease of fruit

C．To summarize the chain reaction of ripening

D．To caution against eating unwashed fruit

Listen again to part of the lecture. Then answer the question. Why does the professor ask this:

A．To test the students" understanding of plate tectonics

B．To describe an event that confuses many scientists

C．To point out a theory that has never been confirmed

D．To introduce a phenomenon that he intends to explain

Listen again to part of the lecture. Then answer the question. Why does the professor say this:

A．To complain about government's power over business

B．To give examples of economic organizations

C．To criticize the unfairness of the capitalist system

D．To contrast a pure market economy with a mixed economy