英语 高二 选择题 较难 ★ 精品

过去完成时的用法 — 英语选择题

外研社版·英语(高中) Unit 4 Meeting the muse AI 三重审校通过

题目
At 9:00, the curator found that someone ___ the labels. The record showed that the change had been made at 8:30. Which verb form best completes the sentence? A. had changed B. changed C. has changed D. was changing