Do you like cleaning up your room?If you don't,this must be your favorite-a special kind of
machine.Maybe you won't believe that I made the machine.It is used for cleaning your desks.It
can put up the books onto the bookshelves in the order you set on.It looks like a ballet dancer when
it works.I think this would be helpful for the people who are too busy or too tired to clean their desks.
（答案不唯一）