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从所给的四个选项中选择最佳答案He came into the room, a song happily.A.singingB.sangC.and singingD.to sing

编辑:chaxungu时间:2026-04-24 12:51:15分类:高中英语题库

从所给的四个选项中选择最佳答案He came into the room, ______ a song happily.
A.singingB.sangC.and singingD.to sing在线课程A