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

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

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