The day _____ Nelson Mandela helped me was one of my happiest. A. which B. when C. that D. why
2022-09-05 01:25:29 180次 广东省潮州市2018-2019学年高一上学期期末教学质量检测（含听力）英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
The day _____ Nelson Mandela helped me was one of my happiest.
A. which B. when C. that D. why
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