题目内容
Three hundred firemen raced to the hotel after a smoke detector(检测器)_____ the alarm soon after midnight.
A. set out B. set off C. give away D. give off
B
解析:
略
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题目内容
Three hundred firemen raced to the hotel after a smoke detector(检测器)_____ the alarm soon after midnight.
A. set out B. set off C. give away D. give off
B
略