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单选题
_____
A
Three weeks ago.
B
Last month.
C
Last week.
D
Last Monday.
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参考解析
解析：
细节题。从选项可知，该题提问时间，听时注意时间名词，根据关键句“we finished installing them last week”可知，时间为上个星期。
细节题。从选项可知，该题提问时间，听时注意时间名词，根据关键句“we finished installing them last week”可知，时间为上个星期。
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