摘要:2142] He must habe been late for the conference yesterday, ? [译文] 昨天的新闻发布会他迟到了是吗? A. didn’t he B. haven’t he C. mustn’t he D. wasn’t he [答案及简析] D. 情态动词表推测.后面的反意疑问句应该与实际世态一致.

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