The great pianist performed in the centre of stage, _______ command the keys were producing wonderfu...
2022-09-01 07:14:16 91次 江苏省南通市2019届高三三月检测卷英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
The great pianist performed in the centre of stage, _______ command the keys were producing wonderful tunes.
A. at whom B. at whose
C. in whom D. in whose
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