【正确答案】 B

【答案解析】[听力原文] 23-25 W: Look, I'm sorry, but 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. 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 so sell it directly to you. Do you have a phone in the dorm? M: Yeah. 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. 23．What do the speakers mainly discuss? [解题思路] 本题考查的会话的主要内容。 [详细解答] 先浏览题目，然后听的时候注意关键词。会话中"book" "Chem．100"等关键词反复出现，由此可以断定B为正确答案，

【正确答案】 B

【答案解析】[听力原文] Why is the man worried about the course? [解题思路] 本题是细节题。 [详细解答] 先看题目，再有针对性的认真听。会话中提到" I didn't do that well in chemistry in high school"，由此可以做出正确的选择。

【正确答案】 C

【答案解析】[听力原文] What will the man do before he leaves? [解题思路] 本题是推理题。 [详细解答] 首先要听明白大致内容，然后做出推理。会话中提到" I'll just put my name and phone number on the notice"