单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage.
What is the speaker’s hobby

A.Listening to different styles of conversations
B.Listening to the content of different conversations.
C.Listening to how salesmen talk to different people.
D.Listening to conversations in publi