单选题
When a fire ______ at the National Exhibition in London, at least ten priceless paintings were completely destroyed.
A、
broke off
B、
broke out
C、
broke down
D、
broke up
【正确答案】
B
【答案解析】
[考点] 词语搭配
break off：折断，突然终止；break out：爆发，(战争、火灾、疾病等)突然发生；break down：出故障，失效；break up：破碎，解散。故选B。
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