英语 词汇题 较难 ★ 精品 动词时态与语态辨析 — 英语词汇题 大学英语三级(CET-3) 词汇与语法 AI 三重审校通过 题目 By the time the director asked for the results, the experiment ______ by the new team. A. was completing B. had completed C. has been completed D. had been completed 登录后查看答案与解析 用此考点生成试卷 更多英语词汇题