The whole building ______ burned down. But the heavy rain ______.

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问题 The whole building ______ burned down. But the heavy rain ______.

选项 A、might have been; had helped
B、could have been; helped
C、was; could help
D、must have been; help

答案B

解析 句意为:整栋楼可能都已经烧掉了,但幸亏那场大雨救了急。could have been意为“有可能已经……”。例:If I hadn’t warned you,you could have been killed。答案为B。
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