王老师:19139051760(拨打)复制微信 题目 更新时间:2024/8/10 Only when class began _______that he had left his book at home.A. will he realize B. he did realizeC. did he realize D. should he realize 答案 登录 注册 C 出自:国家开放大学 >> 国家开放大学英语语法 山东农业大学继续教育学院