There is a sofa ------ the table
behind
Is there a table in front of the sofa?
yes, there is
Is there a bookshelf in front of the bed?
No, there isn't
there is a computer ------ the desk
on
There is a chair ------ the desk?
in front of
Is there a bookshelf next to the sofa?
yes, there is
there is a clock -------- the bookshelf
on
there is a bookshelf -------- the bed
next to
Is there a desk next to the chair?
No, there isn't