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获取事实性细节信息 — 英语词汇题

大学英语三级(CET-3) 听力理解-短对话 AI 三重审校通过

题目
W: I thought the lecture on environmental protection would start at 2:30, but it was put off by forty minutes. M: Yes, and it lasted an hour and a half. Q: When did the lecture end?