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：情景交际. I’m not sure 我不确定;I hope not我希望不;I’d rather not 我宁愿不; I don’t think so 我不这么认为.句意:噪音是什么?听起来好像来自楼下.根据下文,肯定是隔壁的窗户清洁工正在工作.结合语境可知选D.
