C是过去进行时。A是将来时，表示“什么会继续”，这句逻辑不通。如果还没有发生，不能断定“no one know没人懂得”。B 是现在完成时。但是go on 是一个带有将来含义的词组。不能这么用。D选项中，happen不用在被动语态中。
No one know ( )A、what is going on B、what has gone on C、what
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