听力同义转述与推理 — 英语词汇题

听力理解：录音中女士说：The lecture was supposed to begin at 9:00, but the speaker didn't turn up until half an hour later, and it was nearly noon when it finally drew to a close. 问：How long did the lecture actually last? A) Half an hour. B) Two and a half hours. C) Three hours. D) Three and a half hours.