—I wonder why Mr. Brown hasn’ t showed up at the meeting yet. —I’ m not sure, bu

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问题 —I wonder why Mr. Brown hasn’ t showed up at the meeting yet. —I’ m not sure, but he______in a traffic jam driving here.

选项 A、could be stuck
B、might stuck
C、might have been stuck
D、must have stuck

答案 C

解析表示对过去已经发生事情的推测应该用情态动词的完成时形式，might表示的可能性不大；结合上下文的意思可以知道应该用被动形式。

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Thereportshowedusvery(clear)______howtheplanecrashed.clearly根据原句的语法结构，不