作业帮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 singthey are doing housework.（改成一般疑问句和否定句）
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）
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）
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