问题
选择题
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
答案：C
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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：C