◎ 题干
— What's the problem, Sir?
— You _____ at least at a speed of about 100 miles per hour.

A. are driving
B. drove
C. were driving
D. have been driving
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“— What's the problem, Sir? — You _____ at least at a speed of about 100 miles per hour. [ ]A. are driving B. droveC. were driving D. have been driving …”主要考查了你对  【过去进行时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。