结构推理 他们大多数人从头一天早上起就一直在干。今晚他们仍然谁也睡不成。(to be up; none of them)
【正确答案】Most of them had been up since the morning before yesterday. But none of them will sleep tonight either.
【答案解析】[翻译指导] to be up表示“一直在做某事”；全部否定用none of them。