【正确答案】
B
【答案解析】[听力原文]
M: Excuse me. I would like to change rooms if possible.
W: Sure, but could you tell me why?
M: The traffic outside is too noisy. I couldn"t sleep at all last night.
W: I am sorry to hear that, sir. Let me check and see what is available.
M: Thank you.
W: Well, we have a few rooms available.
M: Great. Can I change my room right now?
W: Which room are you in?
M: Room 201.
W: Can I put you into Room 206 on the opposite side away from the street?
M: OK. What do I need to do to transfer?
W: Let me check you out of your old room first.
Why does the man want to change his room?
[解析] 事实细节题。对话中女士询问男士换房间的原因时，男士回答说因为外面的车流声太嘈杂，故正确选项为B。其他选项对话中都没有提及。