英语 高一 词汇题 较难 ★ 精品 过去完成时的用法 — 英语词汇题 沪教版·英语(高中) Unit 4 Achievements AI 三重审校通过 题目 Complete the sentence with the past perfect form of the verb in brackets: When the science fair opened, Lena ______ already ______ (build) a working model, although her report was not finished. 登录后查看答案与解析 用此考点生成试卷 本单元全部练习题 更多英语词汇题