【单选题】

{{I}}Questions 5 to 7 are based on the following conversation.At the end of the conversation, you will be given 15 seconds to answer the questions. Now listen to the conversation.{{/I}} What will the man do before he leaves

A、Check out a chemistry book.
B．Make copies of all the pages in the book.
C．Put a notice on the bulletin bearD、
D．Look for a copy of the book on the reserve shelf.