the classroom is not clean.变成疑问句和肯定与否定回答怎么变?

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the classroom is not clean.变成疑问句和肯定与否定回答怎么变?

the classroom is not clean.变成疑问句和肯定与否定回答怎么变?
the classroom is not clean.变成疑问句和肯定与否定回答怎么变?

the classroom is not clean.变成疑问句和肯定与否定回答怎么变?
Is the classroom clean?Yes,it is.\/No,it isn't.