单选题
What led the policemen to search for the flat?
A、
The light
B、
That piece of paper thrown away outside the flat.
C、
The double lock.
D、
The closed windows.
【正确答案】
B
【答案解析】
[解析]从文章最后一段：“We've just found this note，”he said，As it says“No milk till Monday，”I thought the flat might be empty and the light left on by mistake。故应选B。
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