I think I must keep ________ the piano at home. A. on play B. to play C. on playing D. played
2022-09-26 09:08:36 200次 重庆市2018-2019学年八年级下学期第一阶段测试英语试卷 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
I think I must keep ________ the piano at home.
A. on play B. to play C. on playing D. played
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