问题
选择题
When _____ back to Kaifeng when you arrived in Zhengzhou?[ ]
A. you came
B. did you come
C. do you come
D. came
答案
答案：B
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When _____ back to Kaifeng when you arrived in Zhengzhou?[ ]
A. you came
B. did you come
C. do you come
D. came
答案：B