◎ 题干
The young girl sitting next to me on the plane was very nervous. She ____ before.
[     ]
A. hasn't flown
B. didn't fly
C. hadn't flown
D. wasn't flying
◎ 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“The young girl sitting next to me on the plane was very nervous. She ____ before.[ ]A. hasn't flown B. didn't flyC. hadn't flownD. wasn't flying…”主要考查了你对  【过去完成时】  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。