单项选择题


In this section you will hear everything ONCE ONLY. listen carefully and then answer the questions that follow.

Questions 1 to 5 are based on a conversation. At the end of the conversation, you will be given 10 seconds to answer each of the following 5 questions.
Now listen to the conversation.
According to the dialogue, what class is Prof. Green teaching

A.Literature.
B.History.
C.Economics.
D.Psychology.