听力原文：W: Look, I'm sorry, but （23)the books for Chem. 100 aren't in yet.M: Why not？ Sch

听力原文：W: Look, I'm sorry, but (23)the books for Chem. 100 aren't in yet.

M: Why not？ School started last week.

W: I really don't know. Maybe the professor ordered them late, or the publisher ran out of then and they are on back order.

M: This is awful. I'm worried' about this course anyway. (24) I didn't do that well in chemistry in high school.

W: I know what you mean. Did you check the used book section？

M: Yes. No luck there.

W: Okay. Look, why don't you go over to the library？ I'll bet that the professor put at least one copy on reserve.

M: Do you think so？ That would be great. At least I could make copies of the pages that I need until the books come in. Oh, wait. If there's only one copy, everyone will be trying to do that.

W: True. Well, we do have a bulletin board. You could put a notice up that you are looking for a book for Chemistry 100, and maybe someone who has it will want to sell it directly to you. Do you have a phone in the dorm？

M: Yeah. (25) I'll just put my name and phone number on the notice. That's a great idea! Where's the bulletin board？

W: By the T-shirts and clothing near the front door. Oh, and be sure to put down the exact title of the book, too, because they don't always use the same one.

M: Thanks. You've been a big help.

(20)

A．A notice on the bulletin board.

B．A book for a class the man is taking.

C．A chemistry class that is being taught.

D．The library reserve desk.