题目内容
【题目】They sing in the classroom together. (改为一般疑问句)
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【答案】Do they sing in the classroom together?
【解析】
原句句意：他们一起在教室里唱歌。该句是含有实意动词的肯定句。主语是复数人称，改为一般疑问句需加助动词do，故答案为Do they sing in the classrom together?
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