A、Because she was deeply impressed by the professor. B、Because she found the physics class very interesting. C、Because she felt

W: Hi! Bob, what are you thinking about our graduation?
M: Nothing special.
W: Are you kidding? I wasn’t born yesterday.
M: Well, Time flies! The day when we first entered this university is just like yesterday. These four years are really the time of my life.
W: You said it!(23)We do have a lot of fun, and can never get the stupid things we did out of our heads.
M:(23)Can you share it with me?
W: Sure! In order to give the professor a deep impression, I went to the classroom very early for the first time to attend the biology class. 1 chose a seat at the first row and waited for the class.
M: Then what happened?
W: The professor welcomed the class by saying: "Welcome to the world of physics!"
M: Physics? You got the wrong classroom? What did you do then?
W: I stayed there pretending to listen and making notes.
M: You should have left immediately for your class.
W:(24)I am too shy to leave a class in front of so many students.(23)Well, Tell me something about you.
M: OK. It was really not my day. I went to the cafeteria and got my meal, but suddenly I fell down due to a pool of water on the ground.
W:(25)You are so unlucky! There are so many people there. You must be out on a limb.
M:(25)You bet! They all turned their faces and laughed at me. I just escaped from the cafeteria.
W: Escaped without having your meal?
M: The stupidest thing is I got instant noodles as my meal for one week in fear of being recognized.
23. What are the speakers talking about?
24. Why didn’t the woman leave the wrong classroom immediately for her class?
25. How did the man feel when he fell down to the cafeteria ground?