第28题: [单项选择]Only when we had finished all the work ______ that it was too late to take a bus home. A. did we realize B. will we realize C. we did realize D. we will realize 参考答案:A 答案解析:[解析] 本题考查倒装句。因为副词only与介词短语或从句等连用,放在句首表示强调时,句子语序应倒装,所以C项和D项排除。又因该句从句使用了过去完成时,表示动作发生于主句动作之前,所以主句应该用一般过