While the boy down the street, the UFO landed． A. had walked B. was walking C. has walked D. is walk...
2022-10-18 05:03:07 162次 中考英语复习语法之时态专项练习题 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
While the boy down the street, the UFO landed．
A. had walked B. was walking C. has walked D. is walking
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