题目内容

Not until____________the exam _________ the importance of doing homework.

       A.had he failed; he realized                         B.he had failed; did he realize           C.he had failed; he realized                      D.had he failed; did he realize

练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网