It took me a long time before I was able to fully appreciate what they __ for me. A．had done B．did C...
2022-12-17 04:15:31 66次 2012-2013学年内蒙古高三5月月考英语卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
It took me a long time before I was able to fully
appreciate what they __ for me.
A．had done B．did C．would do D．were doing
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