问题 更新时间2024/8/10 20:54:00 We are glad that in the past few years, we, by joint efforts, ( ) both business and friendship.A.have greatly promoted B.have greatly been promotedC. had greatly promoted D.had greatly been promoted 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