十分期待!
回答于 1秒前
at the booking office是介短作表语,buying a ticket是现在分词作状语
事情曝光已成为过去的事实,所以我觉的这句话应该是:even though the facts had became public no one would have known.即“主从句都虚拟”。但是根据句意,从句也可以不虚拟而只有主句虚拟,所以从句用了become,而主句用了would have done,表达的意思是“即便现在事情曝光,过去也不会有人知道”。个人看法,仅供参考,如...