What’s the noise ? It sounds as if it comes from upstairs.. It must be the window-clean

问题补充：

What’s the noise ? It sounds as if it comes from upstairs.

--. It must be the window-cleaner working , next door.

A. I’m not sure

B. I hope not

C. I’d rather not

D. I don’t think so

答案：

A. I’m not sure

B. I hope not

C. I’d rather not

(答案→)D. I don’t think so

解析：考察日常用语，四个选项分别表示，我不确定、我希望不、我宁愿不和我不这样认为。根据题意，噪音是什么？听起来好像是来自楼上。—— 肯定是隔壁窗户清洁工在工作，可知选D，我不这样认为。