听力原文：M: As usual, the lecture hall is in a complete mess this afternoon. Newspapers, s

oda cans, used tissues, all of them, just thrown all over the floor. I can't understand how people can be so thoughtless.

W: Well, your professor should have the authority to get something done about it.

Q: What does the woman suggest the man do？

(19)

A．Tell his professor about the condition of the lecture hall.

B．Organize a team of students to clean the lecture hall.

C．Find out who has been making a mess.

D．Wait to see if the problem will be solved.