学帮网listen!she（）in the classroom.A.is singing B.sing C.to sing D.is singthey are doing housework.（改成一般疑问句和否定句）
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listen!she（）in the classroom.A.is singing B.sing C.to sing D.is sing
they are doing housework.（改成一般疑问句和否定句）
A.is singing
由listen!可知是现在进行时.
要用be doing形式.、
一般疑问句：Are they doing housework?
否定句：They are not doing housework.
A
A
Are they doing housework.?
They are not doing housework
望采纳
A。
一般疑问句：Are they doing housework?
否定句：They are not doing housework.
A