问题 更新时间2023/5/23 23:32:00 I was giving a talk to a large group of people,the same talk I ___to half a dozen other groups before. 单选题 (10 分) 10分 A.was giving B.am giving C.had given 答案 登录 注册 C 出自:国家开放大学 >> 国家开放大学人文英语4