参考答案

正确答案：A
解析：一般来讲，此类题目，几个选项都具有很强的迷惑性，一定要正确理解。关键词可以给出提示。依据会话中提到的“but he has so many people in our room all the time that I can't study．And the stereo is on constantly”可以做出推理。