They are doing their homework．
一般疑问句：Are they doing their homework？Are they doing their homework？
否定句：They are not doing their homework．They are not doing their homework．
【考点】陈述句与一般疑问句转换．
【答案】Are they doing their homework？；They are not doing their homework．
【解答】
【点评】
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发布：2025/4/11 13:0:1组卷：24引用：4难度：0.7
