英语三级B级
单选题—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.
—I' m not sure, but he ________ in a traffic jam driving here.
参考答案：C进入在线模考
本题答案：C。句意：一我想知道布朗先生为什么还没有出席会议。一我不确定，但是他可能在来这儿的路上遇到了堵车。本题考查的是动词时态及语态。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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