延安中路1228号:一道选择题,应该选A还是B,为什么?
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___have you been a vegetarian?
A. When B. Since when C. When ago D. Since when ago
一道选择题,应该选A还是B,为什么?
A. When B. Since when C. When ago D. Since when ago
一道选择题,应该选A还是B,为什么?