He walked down the hills, and ________ softly to himself. A. sing B. singing C. sings D. was singing...
2022-11-30 14:11:25 50次 2015届浙江省高二上学期期中考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
He walked down the hills, and ________ softly to
himself.
A.
sing B.
singing
C. sings D.
was singing
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