题目内容
【题目】A big fire ________ in the morning suddenly.
A. was broken out B. broke up
C. broke out D. broke off
【答案】C
【解析】
句意:在上午突然发生了一场大火。
break out爆发,没有被动语态和进行时;break up分解;break off中断。结合句意,此处表示爆发了大火,故用broke out,故选C。

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