they have to mend their machine after work. ------------------------(对划线部分提问)

题目

they have to mend their machine after work. ------------------------(对划线部分提问)
they have to mend their machine after work.
_______________ (对划线部分提问)
____ ____they have to do after work.
we have to clean the room now.(改为否定句)
we ____ ____ ____clean the room now.

答案

What do they have to do after work?
We don't have to clean the room now.