—Have you ever visited the Water Cube? —Yes. When I served as a volunteer in Beijing, I it twice. A．...
2023-01-01 09:59:46 31次 2011-2012学年安徽省高三最后一卷英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
—Have you ever visited the Water Cube?
—Yes. When I served as a
volunteer in Beijing, I it twice.
A．have visited B．visited
C．had visited D．had been visiting
本题链接：
