答案选D.didn't
反意疑问句,从last week 可以判断这里只有D.didn't正确最佳答案是was't吗当must+have done表示对过去的情况进行推测（一般句中有明确的过去时间状语），问句要根据陈述部分谓语的情况用“didn't+主语”或“wasn't/weren't+主语”；如果强调动作的完成（一般没有明确的过去时间状语），问句要用“haven't/hasn't+主语”。 　　She must have read the novel last week,didn't she? 　　她上星期一定读了这本小说，是吗？ 　　You must have told her about it,haven't you? 　　你一定把这事告诉她了，是吗？恕我愚昧，was‘t是最佳的吗？是的