The girl was often heard _______ happily in her room. A. sings B. sing C. singing D. to sing
2023-02-12 18:25:41 38次 2013-2014学年辽宁省丹东市九年级上学期第二次月考英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
The girl was often heard _______ happily in her room.
A. sings B. sing C. singing D. to
sing
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