填空题 1 (他一进入)the classroom when he realized that he had forgotten his textbook.

  • 1、
【正确答案】 1、Hardly had he entered    
【答案解析】本题的考查点是句型“一…就…。”的表达方法，英语中有两种表达Hardly…when…或as soon as，此句后面出现when一词，所以是第一种表达方法。