The girl was often heard ______ happily in her room. A. sing B. to sing C. singing D. sings
2023-02-22 12:34:09 182次 2011-2012学年辽宁省大石桥市九年级中考模拟考试（四）英语试题（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.
sing
B. to sing C.
singing D. sings
本题链接：
