This is (a classroom ).改成否定句_________________ 改成

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This is (a classroom ).改成否定句_________________ 改成
This is (a classroom ).
改成否定句_________________
改成一般疑问句________________
肯定回答__________________
否定回答___________________
对括号里提问_________________

This isn't a classroom.
Is this a classroom?
Yes,it is.
No,it isn't.
What's this?

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