王老师:19139051760(拨打)复制微信 题目 更新时间:2024/8/10 -Has Tommy finished his homework yet?-I have no idea; he ____ it this morning.A. was doing B. had been doingC. has done D. did 答案 登录 注册 A 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