________ no one in the building when the fire broke out．So the building was almost destroyed．A.There wereB.There were toC.There happened to beD.There happened
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C解析分析：从四个被选项看，本句应以there开头，且从后一个句子的意思推测前一个句子的意思是：火灾发生时，大楼里没有人。故用there be句型，而句子的主语是no one，应是单数形式，故选there happened to be。发散点：本题是个there be句型，而happen又是个不及物动词，用在谓语中，构成there happen to be．．． happen to do．．．意为“碰巧……”。本题句子的意思是“当火灾发生时，大楼里碰巧没有人。所以整个楼房几乎全破坏了”。