句型转换:They are doing housewoek.(分别改成一般疑问句和否定句)The students are cleaning theclassroom.(改为一般疑问句并做肯定和否定回答) I m playing the football in the piayground.(把in the piayground进行疑
来源:学生作业帮助网 编辑:作业帮 时间:2024/12/02 06:38:39
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