The children are having fun ________ on the playground. A．to play B．play C．playing D．played
2023-01-09 02:02:52 140次 2014-2015学年山东临沐青云镇中心中学九年级12月学情监测英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
The children are having fun ________ on the playground.
A．to play B．play C．playing D．played
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