Thewholebuilding________burneddown,

发布时间：2020-07-27 01:28:41

The whole building ________ burned down, but the heavy rain ________.A.might have; would helpB.could have been; helpedC.must have; helpedD.should have been; was helping

网友回答

B解析本题前半部分是虚拟，“本来会烧毁的”，后半部分是陈述语气，表示实际情况，而且是过去发生的事情，用could+现在完成时和过去时．
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