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题目内容
（郑州工程技术学院-大学英语1）
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
(A)broke off
(B)broke out
(C)broke down
(D)broke up
参考答案