王老师:19139051760(拨打)复制微信 题目 更新时间:2023/12/8 — Has Jack finished his homework yet? —I have no idea; he ____ it this morning.(2.5分)A: was doingB: had been doingC: has doneD: did 答案 登录 注册 A 出自:梦想在线 >> 武汉科技大学大学英语2 武汉科技大学继续教育学院